Laparoscopic nephron-sparing surgery for the treatment of canine dioctophymosis.

This paper reports on two cases of laparoscopic nephrotomy employed in the treatment of canine dioctophymosis, which is considered a unusual procedure and a new treatment proposal heretofore not performed in veterinary medicine. Two patients were treated, one with a history of hematuria and the other with incidental finding of the parasite in the abdominal cavity during elective ovariohysterectomy. Both dogs were subjected to abdominal ultrasound, which produced images indicating the presence of the parasite in the right side kidney, but with partial parenchymal preservation. The patients were therefore subjected to laparoscopic nephrotomy. The surgical procedure was effective in treating dioctophymosis and enabled minimum tissue invasion during surgery, in addition to preservation of the kidney.

Linfoma renal primário em cão / Primary kidney lymphoma in a dog

Background: Lymphoma is a malignant lymphoid tumor originating in the lymph nodes or other solid organs and comprises90% of all hematopoietic tumors in dogs. However, primary kidney lymphoma is rare and is associated with nonspecificclinical signs. Tumor invasion in both kidneys can cause severe clinical signs due to renal failure, complicating the patientstreatment and prognosis. The aim of this case was to report the case of a dog affected by bilateral primary kidney lymphoma. In addition, to characterize the clinical and histopathological presentation due to the intense morphological changes.Case: A 5-year-old male Poodle dog was admitted showing apathy and emesis for 5 days. On physical examination, thedog showed 10% of dehydration, reddish oral mucous membranes, poor body condition (score 1/5), uremic breath, andpain in the kidney area. Complementary tests revealed severe low white blood cells count, high BUN levels, high levels ofpotassium, calcium, and phosphorus (serum biochemistry). Abdominal ultrasound showed bilateral kidney enlargement.Fine needle aspiration of the mass (guided by ultrasound) revealed round cell tumor. Radiographs showed no alterations.The dog died due to his poor condition and necropsy was performed. On post-mortem examination, the kidneys were bothenlarged, pale, and with an irregular subcapsular surface. The histopathological diagnostic was primary renal lymphoma.Immunohistochemical staining revealed that neoplastic cells were strongly positive for anti CD20 and PAX5, while negative for CD3, supporting the diagnosis of B-cell lymphoma.Discussion: The diagnosis was based on clinical, complementary tests, fine needle aspiration, histopathological andimmunohistochemical findings. In dogs, primary kidney tumors are uncommon and usually malignant. The presence ofvomiting, uremic breath, dehydration, weight loss, and erosive and ulcerative lesions on the tongue (uremic glossitis)...(AU)

Linfoma renal primário em cão / Primary kidney lymphoma in a dog

Background: Lymphoma is a malignant lymphoid tumor originating in the lymph nodes or other solid organs and comprises90% of all hematopoietic tumors in dogs. However, primary kidney lymphoma is rare and is associated with nonspecificclinical signs. Tumor invasion in both kidneys can cause severe clinical signs due to renal failure, complicating the patient’streatment and prognosis. The aim of this case was to report the case of a dog affected by bilateral primary kidney lymphoma. In addition, to characterize the clinical and histopathological presentation due to the intense morphological changes.Case: A 5-year-old male Poodle dog was admitted showing apathy and emesis for 5 days. On physical examination, thedog showed 10% of dehydration, reddish oral mucous membranes, poor body condition (score 1/5), uremic breath, andpain in the kidney area. Complementary tests revealed severe low white blood cells count, high BUN levels, high levels ofpotassium, calcium, and phosphorus (serum biochemistry). Abdominal ultrasound showed bilateral kidney enlargement.Fine needle aspiration of the mass (guided by ultrasound) revealed round cell tumor. Radiographs showed no alterations.The dog died due to his poor condition and necropsy was performed. On post-mortem examination, the kidneys were bothenlarged, pale, and with an irregular subcapsular surface. The histopathological diagnostic was primary renal lymphoma.Immunohistochemical staining revealed that neoplastic cells were strongly positive for anti CD20 and PAX5, while negative for CD3, supporting the diagnosis of B-cell lymphoma.Discussion: The diagnosis was based on clinical, complementary tests, fine needle aspiration, histopathological andimmunohistochemical findings. In dogs, primary kidney tumors are uncommon and usually malignant. The presence ofvomiting, uremic breath, dehydration, weight loss, and erosive and ulcerative lesions on the tongue (uremic glossitis)...

Polyostotic osteosarcoma associated with avian leukosis virus infection in a captive bare-faced curassow (Crax fasciolata).

BACKGROUND: Osteosarcoma is a malignant mesenchymal bone tumor. Although it is a common tumor in the appendicular skeleton of dogs and cats, it is rarely reported in birds. Retroviruses are usually associated with solid tumor development in different avian species. CASE PRESENTATION: This report aims to describe a case of osteosarcoma associated with the avian leukosis virus in a captive bare-faced curassow (Crax fasciolata). A captive adult female bare-faced curassow presented with lameness, hyporexia, and a non-ulcerative and firm tumor in the right femur. The bird was euthanized due to the poor prognosis. Histopathology revealed an infiltrative mesenchymal neoplasm consisting of spindle cells with moderate cell pleomorphism, organized in bundles and interspersed by marked deposition of the osteoid matrix, which was compatible with osteosarcoma affecting both femur and tibiotarsus, with renal metastasis. Immunohistochemistry of the primary and metastatic tumor demonstrated vimentin expression by neoplastic cells. Samples of the neoplasm, bone marrow, and spleen were processed for PCR, which enabled the demonstration of proviral avian leukosis virus (ALV) DNA. CONCLUSIONS: To the best of our knowledge, this is the first report of an osteosarcoma in a bare-faced curassow with an unusual polyostotic manifestation and associated with ALV infection.

Adenocarcinoma renal em faisão-de-coleira (Phasianus colchicus) / Renal adenocarcinoma in collared pheasant (Phasianus colchicus)

O faisão-de-coleira (Phasianus colchicus) pertence à família Phasianidae, sendo originário da Ásia, ocupando áreas naturais das regiões da Rússia, China, Nepal e Japão. Há uma relação direta entre longevidade e neoformações em animais selvagens. Neoplasias renais são raramente observadas em aves selvagens de vida livre e ocasionalmente ocorrem em animais domésticos, porém com relatos escassos na literatura científica em relação a aves selvagens mantidas sob cuidados humanos. O presente artigo relata o diagnóstico histopatológico de adenocarcinoma associado à coinfecção por Histoplasma sp em um exemplar de faisão-de-coleira mantido sob cuidados humanos em uma coleção de animais selvagens.

The collared pheasant (Phasianus colchicus) is an exotic bird, belong to order Galliformes, family Phasianidae, being originally from Asia, occupying natural areas in the regions of Russia, China, Nepal and Japan. There is a direct relationship between longevity and neoformations in wild animals. Renal neoplasms are rarely observed in wild freeliving birds and occasionally occur in domestic animals, but with scarce reports in the scientific literature related wild birds kept under human care. The present article reports the histopathological diagnosis of adenocarcinoma associated with co-infection with Histoplasma sp in a specimen of collared pheasant kept under human care in a wild animal collection.

Adenocarcinoma renal em faisão-de-coleira (Phasianus colchicus) / Renal adenocarcinoma in collared pheasant (Phasianus colchicus)

O faisão-de-coleira (Phasianus colchicus) pertence à família Phasianidae, sendo originário da Ásia, ocupando áreas naturais das regiões da Rússia, China, Nepal e Japão. Há uma relação direta entre longevidade e neoformações em animais selvagens. Neoplasias renais são raramente observadas em aves selvagens de vida livre e ocasionalmente ocorrem em animais domésticos, porém com relatos escassos na literatura científica em relação a aves selvagens mantidas sob cuidados humanos. O presente artigo relata o diagnóstico histopatológico de adenocarcinoma associado à coinfecção por Histoplasma sp em um exemplar de faisão-de-coleira mantido sob cuidados humanos em uma coleção de animais selvagens.(AU)

The collared pheasant (Phasianus colchicus) is an exotic bird, belong to order Galliformes, family Phasianidae, being originally from Asia, occupying natural areas in the regions of Russia, China, Nepal and Japan. There is a direct relationship between longevity and neoformations in wild animals. Renal neoplasms are rarely observed in wild freeliving birds and occasionally occur in domestic animals, but with scarce reports in the scientific literature related wild birds kept under human care. The present article reports the histopathological diagnosis of adenocarcinoma associated with co-infection with Histoplasma sp in a specimen of collared pheasant kept under human care in a wild animal collection.(AU)

Adenocarcinoma renal papilar em um cão - relato de caso / Papillar renal adenocarcinoma in a dog - case report

O trabalho teve como objetivo relatar um caso de adenocarcinoma renal papilar em um cão macho da raça labrador. O animal foi atendido em uma clínica veterinária de Campo Mourão – PR, com queixa principal de hematúria e perda de peso durante quatro meses. No exame físico o animal apresentou aumento de volume intra-abdominal localizado, de consistência firme e desconforto abdominal à palpação. No exame ultrassonográfico, evidenciou-se a presença de cristais, e pequenos cálculos vesicais urinários, inflamação da parede da vesícula urinária e visualizado uma massa localizada em quadrante abdominal caudal esquerdo em região mesogástrica de difícil delimitação e possivelmente envolvendo o rim esquerdo. Foi realizado o procedimento de laparotomia exploratória e na inspeção da cavidade observou-se significativo aumento de volume do rim esquerdo, realizando o procedimento de nefrectomia unilateral esquerda. Uma amostra deste rim foi enviada para análise histopatológica a um Laboratório de Patologia Animal. Nesta avaliação foram observadas células neoplásicas, características por serem poliédricas e exibirem núcleo grande oval, citoplasma pouco abundante eosinofílico, formam estruturas tubulares e projeções intraluminais papiliformes irregulares. O índice mitótico é de 1 – 2 fm./ 40x, observa-se também desmoplasia foco de necrose tumoral, sendo conclusivo de adenocarcinoma renal papilar. Conclui-se que o exame histopatológico é de suma importância para o diagnóstico desta neoplasia. E o adenocarcinoma renal papilar causa uma lesão grave no rim, podendo ocorrer metástase para outros órgãos e levar o animal a morte.

This study aimed to report a case of papillary renal adenocarcinoma in a male labrador dog. The animal was treated at a veterinary clinic in Campo Mourão - PR, with the main complaint of hematuria and weight loss for four months. On physical examination the animal showed localized intra-abdominal volume increase, firm consistency and abdominal discomfort on palpation. The ultrasound examination evinced the presence of crystals, and small urinary bladder stones, inflammation of the urinary bladder wall and it was visualized a mass located in the left caudal abdominal quadrant in the mesogastric region, hardly delimited and possibly involving the left kidney. Exploratory laparotomy and cavity inspection were performed, which significantly increased the volume of the left kidney, performing the left unilateral nephrectomy procedure. A sample of this kidney was sent for histopathological analysis at the Animal Pathology Laboratory. In this evaluation, neoplastic cells, polymer resources and large oval nucleus display, sparse eosinophilic cytoplasm, tubular forms and irregular papilliform intraluminal projections were observed. The mitotic index is 1 - 2 fm./40x, as well as focal desmoplasia of tumor necrosis. Being conclusive of renal papillary adenocarcinoma. To conclude that histopathological examination is extremely important for the diagnosis of this neoplasia. And renal papillary adenocarcinoma causes severe kidney damage, metastasis to other organs can lead to death.

Adenocarcinoma renal papilar em um cão - relato de caso / Papillar renal adenocarcinoma in a dog - case report

O trabalho teve como objetivo relatar um caso de adenocarcinoma renal papilar em um cão macho da raça labrador. O animal foi atendido em uma clínica veterinária de Campo Mourão PR, com queixa principal de hematúria e perda de peso durante quatro meses. No exame físico o animal apresentou aumento de volume intra-abdominal localizado, de consistência firme e desconforto abdominal à palpação. No exame ultrassonográfico, evidenciou-se a presença de cristais, e pequenos cálculos vesicais urinários, inflamação da parede da vesícula urinária e visualizado uma massa localizada em quadrante abdominal caudal esquerdo em região mesogástrica de difícil delimitação e possivelmente envolvendo o rim esquerdo. Foi realizado o procedimento de laparotomia exploratória e na inspeção da cavidade observou-se significativo aumento de volume do rim esquerdo, realizando o procedimento de nefrectomia unilateral esquerda. Uma amostra deste rim foi enviada para análise histopatológica a um Laboratório de Patologia Animal. Nesta avaliação foram observadas células neoplásicas, características por serem poliédricas e exibirem núcleo grande oval, citoplasma pouco abundante eosinofílico, formam estruturas tubulares e projeções intraluminais papiliformes irregulares. O índice mitótico é de 1 2 fm./ 40x, observa-se também desmoplasia foco de necrose tumoral, sendo conclusivo de adenocarcinoma renal papilar. Conclui-se que o exame histopatológico é de suma importância para o diagnóstico desta neoplasia. E o adenocarcinoma renal papilar causa uma lesão grave no rim, podendo ocorrer metástase para outros órgãos e levar o animal a morte.(AU)

This study aimed to report a case of papillary renal adenocarcinoma in a male labrador dog. The animal was treated at a veterinary clinic in Campo Mourão - PR, with the main complaint of hematuria and weight loss for four months. On physical examination the animal showed localized intra-abdominal volume increase, firm consistency and abdominal discomfort on palpation. The ultrasound examination evinced the presence of crystals, and small urinary bladder stones, inflammation of the urinary bladder wall and it was visualized a mass located in the left caudal abdominal quadrant in the mesogastric region, hardly delimited and possibly involving the left kidney. Exploratory laparotomy and cavity inspection were performed, which significantly increased the volume of the left kidney, performing the left unilateral nephrectomy procedure. A sample of this kidney was sent for histopathological analysis at the Animal Pathology Laboratory. In this evaluation, neoplastic cells, polymer resources and large oval nucleus display, sparse eosinophilic cytoplasm, tubular forms and irregular papilliform intraluminal projections were observed. The mitotic index is 1 - 2 fm./40x, as well as focal desmoplasia of tumor necrosis. Being conclusive of renal papillary adenocarcinoma. To conclude that histopathological examination is extremely important for the diagnosis of this neoplasia. And renal papillary adenocarcinoma causes severe kidney damage, metastasis to other organs can lead to death.(AU)

Renal intravascular lymphoma in a dog / Linfoma intravascular renal em um cão

A 10-year-old male large mixed breed dog was presented with skin ulcers and fracture on the right hind limb caused by vehicle collision. Given required limb amputation, and as being a shelter senior dog, euthanasia was requested by the owner and a complete post-mortem examination was conducted immediately after death. Gross changes were consistent with marked bilateral nephromegaly. Histopathological examination of the kidneys revealed round cells filling blood vessels. Immunohistochemically, the round cells were positive for CD3 antibody. Based on these findings, in absence of involvement of the bone marrow and peripheral blood, and inexistence of primary extravascular masses, the tumor was classified as T-cell intravascular lymphoma. To the authors knowledge, this is the first report describing intravascular lymphoma involving the kidneys alone in a dog.(AU)

Um canino, macho, de 10 anos, sem raça definida (SRD), e grande porte, chegou para atendimento apresentando fratura em membro pélvico direito devido a atropelamento por veículo automotivo. Adicionalmente, foram observadas úlceras cutâneas ao nível da fratura. Devido à necessidade de amputação do membro e, por ser um cão idoso, o proprietário optou pela eutanásia, realizando-se necropsia imediatamente após a morte do paciente. Os achados macroscópicos foram consistentes com acentuada nefromegalia bilateral. A avaliação histopatológica dos rins revelou células redondas neoplásicas obliterando vasos sanguíneos. Imunohistoquimicamente, essas células foram positivas para CD3. Baseando-se nos achados histopatológicos, na ausência de envolvimento da medula óssea e do sangue periférico e, na inexistência de massas primárias extravasculares, o tumor foi classificado como linfoma intravascular de células T. Possivelmente, este é o primeiro relato de linfoma intravascular envolvendo unicamente os rins de um cão.(AU)

Renal myxoma in a feline

Background: Renal neoplasms are a rare condition in felines, with metastatic lymphoma presenting the highest incidencerate. Secondary renal neoplasms are more frequent (88%) than primary renal tumors, with primary mesenquimal renalneoplasms accounting for 22% of the cases and the incidence of benign tumors not exceeding 5%. Myxomas are neoplasmsin undifferentiated mesenchymal cells with abundant reproduction of the myxoid matrix, with few few case reports aboutthis type of neoplasm in the veterinary literature. This study reports the first case of renal myxoma in a young feline afflicted by granulomatous nephritis and diagnosed with FIP (Feline Infectious Peritonitis).Case: A 9-month-old, male, mixed breed feline, was admitted into the Veterinary Hospital maintained by the Schoolof Veterinary Medicine and Animal Science, Botucatu, Brazil, presenting symptoms such progressive weight loss andoccasional episodes of emesis for one week, progressing to anorexia, hematochezia, vocalization, lack of coordination,spasms, anuria and inability to defecate. A physical examination revealed moderate dehydration, low temperatures (<33ºC), dyspnea (36 mpm), slight hyperglycemia (187 mg/dL) and distension of the abdomen and of the urinary bladder.The hematological assay and the serum biochemistry assay revealed neutrophilic leukocytosis, thrombocytopenia, anemiaand slight uremia. In view of the severity of the neurologic signs and lack of response to the clinical treatment, the owneropted to euthanize the animal. The necropsy revealed diffused jaundice, with kidney injuries observed through the palecoloration of the tissue and irregular surface with multiple off-white small nodules distributed in a marked and diffuseway. The same injury pattern was observed markedly in the lungs and discretely in the spleen and liver. The material collected was fixed in a 10% formalin solution, and processed according to the routine technique (Hematoxylin & Eosin)...(AU)

Squamous cell carcinoma of unknown primary origin in a dog presenting with bone metastasis.

A 10-year-old female American Pit Bull dog was diagnosed with metastatic undifferentiated carcinoma of the scapula. Immunohistochemistry showed positive immunoexpression for cytokeratins (AE1/AE3, 34BE12, CK7) and vimentin, confirming squamous cell carcinoma. No evidence of nodules was found in the complete physical examination and imaging procedures conducted. The patient was diagnosed with carcinoma of unknown primary origin. Amputation and adjuvant chemotherapy with doxorubicin and piroxicam were performed, but the patient died of respiratory failure after 737 days of diagnosis. Necropsy confirmed undifferentiated carcinoma infiltrating the lungs and kidneys, and showing the same immunoexpression as the tumor in the scapula. Amputation associated with chemotherapy extended the overall survival time of this patient.

Renal myxoma in a feline

Background: Renal neoplasms are a rare condition in felines, with metastatic lymphoma presenting the highest incidencerate. Secondary renal neoplasms are more frequent (88%) than primary renal tumors, with primary mesenquimal renalneoplasms accounting for 22% of the cases and the incidence of benign tumors not exceeding 5%. Myxomas are neoplasmsin undifferentiated mesenchymal cells with abundant reproduction of the myxoid matrix, with few few case reports aboutthis type of neoplasm in the veterinary literature. This study reports the first case of renal myxoma in a young feline afflicted by granulomatous nephritis and diagnosed with FIP (Feline Infectious Peritonitis).Case: A 9-month-old, male, mixed breed feline, was admitted into the Veterinary Hospital maintained by the Schoolof Veterinary Medicine and Animal Science, Botucatu, Brazil, presenting symptoms such progressive weight loss andoccasional episodes of emesis for one week, progressing to anorexia, hematochezia, vocalization, lack of coordination,spasms, anuria and inability to defecate. A physical examination revealed moderate dehydration, low temperatures (<33ºC), dyspnea (36 mpm), slight hyperglycemia (187 mg/dL) and distension of the abdomen and of the urinary bladder.The hematological assay and the serum biochemistry assay revealed neutrophilic leukocytosis, thrombocytopenia, anemiaand slight uremia. In view of the severity of the neurologic signs and lack of response to the clinical treatment, the owneropted to euthanize the animal. The necropsy revealed diffused jaundice, with kidney injuries observed through the palecoloration of the tissue and irregular surface with multiple off-white small nodules distributed in a marked and diffuseway. The same injury pattern was observed markedly in the lungs and discretely in the spleen and liver. The material collected was fixed in a 10% formalin solution, and processed according to the routine technique (Hematoxylin & Eosin)...

Papillary renal adenoma in a toco toucan (Ramphastos toco)

Primary renal neoplasms are infrequent in domestic animals and birds, being budgerigars an exception. This report describes a papillary renal adenoma in a toco toucan (Ramphastos toco), which was euthanized due to poor prognosis after surgical intervention of phalanx fractures in both wings. Grossly, the caudal pole of the right kidney had a nodular lesion measuring 3.5 x 1.7 x 1.5 cm. Microscopically, there was a well delimited neoplasm arranged in large and coalescent papillary structures composed by a single layer of epithelial cells. There was mild to moderate nuclear and cytoplasmic pleomorphism, whereas mitotic figures were absent. In conclusion, this tumor was considered as an accidental finding, which is similar to the majority of adenomas reported in domestic mammals.(AU)

Papillary renal adenoma in a toco toucan (Ramphastos toco)

Primary renal neoplasms are infrequent in domestic animals and birds, being budgerigars an exception. This report describes a papillary renal adenoma in a toco toucan (Ramphastos toco), which was euthanized due to poor prognosis after surgical intervention of phalanx fractures in both wings. Grossly, the caudal pole of the right kidney had a nodular lesion measuring 3.5 x 1.7 x 1.5 cm. Microscopically, there was a well delimited neoplasm arranged in large and coalescent papillary structures composed by a single layer of epithelial cells. There was mild to moderate nuclear and cytoplasmic pleomorphism, whereas mitotic figures were absent. In conclusion, this tumor was considered as an accidental finding, which is similar to the majority of adenomas reported in domestic mammals.

Epitheliotropic lymphoma with heart and kidney metastasis in a dog: case report / Linfoma epiteliotrópico em cão com metástase cardíaca e renal: relato de caso

A female adult dog, with a four-month history of pain and intense pruritus, which eventually resulted in sudden death, was referred for necropsy. Postmortem examination showed thoracic and abdominal serum-sanguineous exudates, multifocal infiltrative renal masses, and similar tumors in the heart. Histopathology revealed midsize infiltrative neoplastic proliferation composed of round cells, sparse cytoplasm, and large hyperchromatic nuclei. Immunohistochemistry revealed CD3+ and CD20-immunoexpression. Histopathological and immunohistochemical findings confirmed the diagnosis of epitheliotropic lymphoma with cardiac and renal metastasis.(AU)

Foi encaminhado para necropsia um cão adulto do sexo feminino, com histórico de dor e prurido intenso com evolução de quatro meses, que acabou resultando em morte súbita. O exame post mortem mostrou presença discreta de exsudato serossanguinolento em cavidades torácica e abdominal, massas renais infiltrativas multifocais e tumores semelhantes no coração. O exame histopatológico revelou proliferação neoplásica infiltrativa composta de células redondas, com citoplasma escasso, e grandes núcleos hipercromáticos. A análise imuno-histoquímica mostrou imunoexpressão CD3+e CD20. Os achados histopatológicos e imuno-histoquímico confirmaram o diagnóstico de linfoma epiteliotrópico com metástase cardíaca e renal.(AU)

Epitheliotropic lymphoma with heart and kidney metastasis in a dog: case report / Linfoma epiteliotrópico em cão com metástase cardíaca e renal: relato de caso

A female adult dog, with a four-month history of pain and intense pruritus, which eventually resulted in sudden death, was referred for necropsy. Postmortem examination showed thoracic and abdominal serum-sanguineous exudates, multifocal infiltrative renal masses, and similar tumors in the heart. Histopathology revealed midsize infiltrative neoplastic proliferation composed of round cells, sparse cytoplasm, and large hyperchromatic nuclei. Immunohistochemistry revealed CD3+ and CD20-immunoexpression. Histopathological and immunohistochemical findings confirmed the diagnosis of epitheliotropic lymphoma with cardiac and renal metastasis.(AU)

Foi encaminhado para necropsia um cão adulto do sexo feminino, com histórico de dor e prurido intenso com evolução de quatro meses, que acabou resultando em morte súbita. O exame post mortem mostrou presença discreta de exsudato serossanguinolento em cavidades torácica e abdominal, massas renais infiltrativas multifocais e tumores semelhantes no coração. O exame histopatológico revelou proliferação neoplásica infiltrativa composta de células redondas, com citoplasma escasso, e grandes núcleos hipercromáticos. A análise imuno-histoquímica mostrou imunoexpressão CD3+e CD20. Os achados histopatológicos e imuno-histoquímico confirmaram o diagnóstico de linfoma epiteliotrópico com metástase cardíaca e renal.(AU)

Linfoma renal primario en gato doméstico (Felis catus): reporte de caso / Primary renal lymphoma in domestic cat (Felis catus): case report / Linfoma renal primário em gato doméstico (Felis catus): relato de caso

Neoplasias primarias renales en los gatos son raros y representan menos del 2% de todos los tipos de cáncer, siendo el más maligno. Tumores hematopoyéticos son las más comunes en los gatos y el 90% son diagnosticados de linfoma, siendo entre el 30 y el 50% de todos los tumores malignos en esta especie. Este tipo de cáncer que se origina en células linfoides de órganos sólidos, como los ganglios linfáticos, el hígado y los intestinos, y en la actualidad es el tipo de cáncer más común en los gatos domésticos con una edad promedio de 11 años. Las formas más comunes de presentación son nodal, mediastínica, extranodal y digestivo. Los signos clínicos son muy variados y relacionados con la localización anatómica donde se desarrolla la enfermedad. La quimioterapia es el tratamiento dado a la forma sistémica, mientras que la radioterapia y la cirugía asociada o no a quimioterapia están indicadas para formas localizadas. El pronóstico de esta enfermedad es variable y depende de la condición clínica del animal, el tipo y la etapa del linfoma y respuesta al tratamiento. El objetivo de este trabajo fue describir el caso clínico de un gato macho, raza mezclada, castrado, de 13 años, que tenía los siguientes signos clínicos: caquexia, aumento de volumen del abdomen, deshidratación, poliuria, polidipsia y pérdida de apetito. Los hallazgos clínicos y patológicos confirmaron linfoma renal [...](AU)

Renal primary neoplasms in cats are rare and account for less than 2% of all cancers, the majority of malignant feature. Hematopoietic tumors are the most common in cats and 90% are diagnosed as lymphoma, being between 30 and 50% of all malignant tumors found in this species. This cancer originates in lymphoid cells found in solid organs such as lymph nodes, liver and intestine, and is currently the most common cancer in domestic cats with an average age of 11 years. The most common forms of presentation are mediastinal, nodal, extranodal and digestive. Clinical signs are diverse and related to the anatomical site in which the disease develops. Chemotherapy is the treatment for systemic forms, while radiotherapy and surgery associated or not with chemotherapy treatments are indicated for localized forms. The prognosis of this disease is variable, depending on the clinical condition of the animal, the type and stage of lymphoma and response to treatment. The objective of this study was to conduct a case report of a cat, male, mixed breed, neutered, 13 years old, who presented the following clinical signs: cachexia, increased abdominal volume, dehydration, polyuria, polydipsia and loss of appetite. The pathology and clinical findings confirmed the renal lymphoma; the primary renal lymphoma was confirmed primarily by the lack of involvement of other sites of cancer. (AU)

Neoplasias primárias renais em gatos são raras e representam menos de 2% de todos os tipos de câncer, sendo a maioria maligna. Tumores hematopoiéticos são os mais comuns em gatos e 90% são diagnosticados como linfoma, estando entre 30 e 50% de todos os tumores malignos encontrados nesta espécie. Esse tipo de câncer se origina nas células linfóides encontrados em órgãos sólidos, como gânglios linfáticos, fígado e intestino, e atualmente é o câncer mais comum em gatos domésticos com idade média de 11 anos. As formas mais comuns de apresentação são mediastinal, nodal, extranodal e digestiva. Os sinais clínicos são variados e relacionados com a localização anatômica em que a doença se desenvolve. A quimioterapia é o tratamento indicado para as formas sistêmicas, enquanto a radioterapia e a cirurgia associada ou não à quimioterapia são indicados para formas localizadas. O prognóstico desta doença é variável e depende da condição clínica do animal, o tipo e estádio de linfoma e da resposta ao tratamento. O objetivo deste trabalho foi realizar o relato de caso de um gato macho, sem raça definida, castrado, de 13 anos, que apresentava os seguintes sinais clínicos: caquexia, aumento do volume abdominal, desidratação, poliúria, polidipsia e perda de apetite. Os achados clínicos e patológicos confirmaram o linfoma renal; o linfoma renal primário foi confirmado principalmente pela falta de [...](AU)

Linfoma renal primario en gato doméstico (Felis catus): reporte de caso / Primary renal lymphoma in domestic cat (Felis catus): case report / Linfoma renal primário em gato doméstico (Felis catus): relato de caso

Neoplasias primarias renales en los gatos son raros y representan menos del 2% de todos los tipos de cáncer, siendo el más maligno. Tumores hematopoyéticos son las más comunes en los gatos y el 90% son diagnosticados de linfoma, siendo entre el 30 y el 50% de todos los tumores malignos en esta especie. Este tipo de cáncer que se origina en células linfoides de órganos sólidos, como los ganglios linfáticos, el hígado y los intestinos, y en la actualidad es el tipo de cáncer más común en los gatos domésticos con una edad promedio de 11 años. Las formas más comunes de presentación son nodal, mediastínica, extranodal y digestivo. Los signos clínicos son muy variados y relacionados con la localización anatómica donde se desarrolla la enfermedad. La quimioterapia es el tratamiento dado a la forma sistémica, mientras que la radioterapia y la cirugía asociada o no a quimioterapia están indicadas para formas localizadas. El pronóstico de esta enfermedad es variable y depende de la condición clínica del animal, el tipo y la etapa del linfoma y respuesta al tratamiento. El objetivo de este trabajo fue describir el caso clínico de un gato macho, raza mezclada, castrado, de 13 años, que tenía los siguientes signos clínicos: caquexia, aumento de volumen del abdomen, deshidratación, poliuria, polidipsia y pérdida de apetito. Los hallazgos clínicos y patológicos confirmaron linfoma renal [...]

Renal primary neoplasms in cats are rare and account for less than 2% of all cancers, the majority of malignant feature. Hematopoietic tumors are the most common in cats and 90% are diagnosed as lymphoma, being between 30 and 50% of all malignant tumors found in this species. This cancer originates in lymphoid cells found in solid organs such as lymph nodes, liver and intestine, and is currently the most common cancer in domestic cats with an average age of 11 years. The most common forms of presentation are mediastinal, nodal, extranodal and digestive. Clinical signs are diverse and related to the anatomical site in which the disease develops. Chemotherapy is the treatment for systemic forms, while radiotherapy and surgery associated or not with chemotherapy treatments are indicated for localized forms. The prognosis of this disease is variable, depending on the clinical condition of the animal, the type and stage of lymphoma and response to treatment. The objective of this study was to conduct a case report of a cat, male, mixed breed, neutered, 13 years old, who presented the following clinical signs: cachexia, increased abdominal volume, dehydration, polyuria, polydipsia and loss of appetite. The pathology and clinical findings confirmed the renal lymphoma; the primary renal lymphoma was confirmed primarily by the lack of involvement of other sites of cancer.

Neoplasias primárias renais em gatos são raras e representam menos de 2% de todos os tipos de câncer, sendo a maioria maligna. Tumores hematopoiéticos são os mais comuns em gatos e 90% são diagnosticados como linfoma, estando entre 30 e 50% de todos os tumores malignos encontrados nesta espécie. Esse tipo de câncer se origina nas células linfóides encontrados em órgãos sólidos, como gânglios linfáticos, fígado e intestino, e atualmente é o câncer mais comum em gatos domésticos com idade média de 11 anos. As formas mais comuns de apresentação são mediastinal, nodal, extranodal e digestiva. Os sinais clínicos são variados e relacionados com a localização anatômica em que a doença se desenvolve. A quimioterapia é o tratamento indicado para as formas sistêmicas, enquanto a radioterapia e a cirurgia associada ou não à quimioterapia são indicados para formas localizadas. O prognóstico desta doença é variável e depende da condição clínica do animal, o tipo e estádio de linfoma e da resposta ao tratamento. O objetivo deste trabalho foi realizar o relato de caso de um gato macho, sem raça definida, castrado, de 13 anos, que apresentava os seguintes sinais clínicos: caquexia, aumento do volume abdominal, desidratação, poliúria, polidipsia e perda de apetite. Os achados clínicos e patológicos confirmaram o linfoma renal; o linfoma renal primário foi confirmado principalmente pela falta de [...]

Renal cell carcinoma with peritoneal carcinomatosis in a mare / Carcinoma renal associado à carcinomatose peritoneal em uma égua

Renal cell carcinoma, especially with extensive involvement of peritoneal cavity, is rarely described in horses. This study described a case of renal cell carcinoma in an 8-year-old mare, which presented with an enlargement in the left flank, decreased appetite and straining to defecate. Clinically, a tumor in the left retroperitoneal space was detected by rectal examination and ultrasonography. The animal died after one month of clinical evolution. At necropsy, the left kidney was completely effaced by a 50cm in diameter, irregular, round, lobulated cystic mass with necro-hemorrhagic areas. Within the peritoneal cavity, there was severe hemoperitoneum and numerous sessile and pedunculated masses ranging from 2.0 to 15.0cm diameter that were attached to the visceral and parietal peritoneum. Histologically, the primary neoplasia and its metastasis were composed by a proliferation of epithelial cells, which were arranged in a tubulopapillary pattern. Diagnosis of renal cell carcinoma with peritoneal carcinomatosis and hemoperitoneum was based on macroscopic aspects, and mainly on the histological features.(AU)

Carcinomas renais, principalmente aqueles com extenso envolvimento da cavidade peritoneal são raramente descritos na espécie equina. Este trabalho tem por objetivo descrever um carcinoma renal com carcinomatose peritoneal em um equino, fêmea, de oito anos de idade, que apresentava aumento de volume no flanco esquerdo, hiporexia e dificuldade para defecar. Clinicamente, um tumor localizado no espaço retroperitoneal esquerdo foi detectado por meio de palpação retal e exame ultrassonográfico. Após um mês de evolução clínica, o animal veio a óbito. Macroscopicamente, o rim esquerdo estava completamente obliterado por uma massa de 50,0cm de diâmetro, irregular, lobulada e com áreas císticas e necro-hemorrágicas. Na cavidade peritoneal, havia hemoperitônio acentuado e inúmeras massas sésseis e pedunculadas, de 2,0 a 15,0cm de diâmetro, estavam aderidas às porções parietal e visceral do peritônio. Histologicamente, a neoplasia primária e suas metástases eram constituídas principalmente pela proliferação de células epiteliais, as quais formavam estruturas túbulo-papilares. O diagnóstico de carcinoma renal com carcinomatose peritoneal, associado a hemoperitônio foi baseado nos achados macroscópicos e, principalmente, histológicos da neoplasia.(AU)

Renal cell carcinoma with peritoneal carcinomatosis in a mare / Carcinoma renal associado à carcinomatose peritoneal em uma égua

Renal cell carcinoma, especially with extensive involvement of peritoneal cavity, is rarely described in horses. This study described a case of renal cell carcinoma in an 8-year-old mare, which presented with an enlargement in the left flank, decreased appetite and straining to defecate. Clinically, a tumor in the left retroperitoneal space was detected by rectal examination and ultrasonography. The animal died after one month of clinical evolution. At necropsy, the left kidney was completely effaced by a 50cm in diameter, irregular, round, lobulated cystic mass with necro-hemorrhagic areas. Within the peritoneal cavity, there was severe hemoperitoneum and numerous sessile and pedunculated masses ranging from 2.0 to 15.0cm diameter that were attached to the visceral and parietal peritoneum. Histologically, the primary neoplasia and its metastasis were composed by a proliferation of epithelial cells, which were arranged in a tubulopapillary pattern. Diagnosis of renal cell carcinoma with peritoneal carcinomatosis and hemoperitoneum was based on macroscopic aspects, and mainly on the histological features.

Carcinomas renais, principalmente aqueles com extenso envolvimento da cavidade peritoneal são raramente descritos na espécie equina. Este trabalho tem por objetivo descrever um carcinoma renal com carcinomatose peritoneal em um equino, fêmea, de oito anos de idade, que apresentava aumento de volume no flanco esquerdo, hiporexia e dificuldade para defecar. Clinicamente, um tumor localizado no espaço retroperitoneal esquerdo foi detectado por meio de palpação retal e exame ultrassonográfico. Após um mês de evolução clínica, o animal veio a óbito. Macroscopicamente, o rim esquerdo estava completamente obliterado por uma massa de 50,0cm de diâmetro, irregular, lobulada e com áreas císticas e necro-hemorrágicas. Na cavidade peritoneal, havia hemoperitônio acentuado e inúmeras massas sésseis e pedunculadas, de 2,0 a 15,0cm de diâmetro, estavam aderidas às porções parietal e visceral do peritônio. Histologicamente, a neoplasia primária e suas metástases eram constituídas principalmente pela proliferação de células epiteliais, as quais formavam estruturas túbulo-papilares. O diagnóstico de carcinoma renal com carcinomatose peritoneal, associado a hemoperitônio foi baseado nos achados macroscópicos e, principalmente, histológicos da neoplasia.