Pleomorphic hyalinizing angiectatic tumor of the vulva: literature review based on a rare presentation

Pleomorphic hyalinizing angiectatic tumor (PHAT) of soft tissues is a rare, non-metastatic tumor of unknown etiology and uncertain behavior, which may recur locally. There are few reports on this condition, and due to the rarity of the disease, its lineage has not yet been fully elucidated. The present study aims to report the case of an unusual entity observed for the first time in vulval topography. A female patient, 83 years old, presented with a tumor in the vulvar region that had evolved for approximately 4 months. Magnetic resonance imaging showed an expansive perineal formation of 8.5 × 3.5 cm, and a hemivulvectomy with a flap rotation was performed. The review of the slides revealed a mesenchymal lesion without significant atypia, which was richly vascularized. In the areas of interest, the immunohistochemical (IHC) study demonstrated positivity for CD34, estrogen, and progesterone receptors; it was negative for the other tested markers. Morphological findings associated with the IHC staining panel supported the diagnosis of PHAT. The main morphological features of PHAT are clusters of ectatic vessels of different sizes that show deposits of subendothelial and intraluminal fibrin. Fusiform and pleomorphic cells randomly arranged in leaves or long fascicles intermingle these vessels. It is essential to recognize this entity and consider it among the differential diagnoses of a mesenchymal lesion, given the wide variety of entities that comprise this group of lesions.

Tumor fibroblástico inguinal superficial positivo para CD34: reporte de un caso y revisión de la literatura / Inguinal superficial cd34-positive fibroblastic tumor: case report and literature review

El tumor fibroblástico superficial de tejidos blandos positivo para antígeno CD34 (CD34) es un tumor raro, de baja frecuencia, que se caracteriza histológicamente por un marcado pleomorfismo, baja actividad mitótica, e inmunoreactividad difusa para CD34. Puede tener un comportamiento similar al de un tumor mesenquimal de malignidad intermedia. Existen sólo 52 casos publicados en la literatura. Se presenta el caso de una paciente de 31 años con una masa en tejidos blandos en región inguinal izquierda, de crecimiento progresivo, de varios meses de evolución dolorosa. La masa fue biopsiada y, con la sospecha de un tumor fibroblástico superficial positivo para CD34, fue posteriormente tratada con una resección ampliada de la lesión y con cobertura del defecto en la piel con un colgajo local de avance de V-Y, con una evolución satisfactoria en su seguimiento postquirúrgico. El reporte de patología confirmó la sospecha diagnóstica de un tumor con reactividad fuerte para CD34, con proteína P53 en 60% a 70%, antígeno Ki67 menor al 15%, sin pérdida de proteína nuclear INI-1, y negatividad para CD31, CD163, AE1AE3, CAM5.2, EMA, CD30, receptores de progestágenos, proteína S100, y desmina, con bordes negativos.

Superficial CD34 (CD34) antigen positive fibroblastic soft-tissue tumor is a rare, lowfrequency tumor, characterized histologically by marked pleomorphism, low mitotic activity, and diffuse immunoreactivity for CD34. It may behave like a mesenchymal tumor of intermediate malignancy. There are only 52 cases published in the literature. We present the case of a 31-year-old patient with a long progressive and painful growth of a soft-tissue lesion in the left inguinal region. The mass was biopsied and, with the suspicion of a superficial CD34-positive fibroblast tumor, it was subsequently treated with an enlarged resection of the lesion and covering the skin defect with a local V-Y advancement flap, with a satisfactory evolution in the postoperative follow-up. The pathology report confirmed the diagnostic suspicion of a tumor with strong reactivity for CD34, with P53 protein in 60% to 70%, Ki67 antigen in less than 15%, without loss of INI-1, and with negativity for CD31, CD163, AE1AE3, CAM5.2, EMA, CD30, progestin receptors, S100 protein and desmin, with negative borders.

Rabdomiosarcoma alveolar con metástasis cardíaca en un paciente pediátrico / Alveolar rhabdomyosarcoma with cardiac metastasis in a pediatric patient

El rabdomiosarcoma es el tumor maligno de partes blandas más frecuente en la edad pediátrica. Puede afectar cualquier localización anatómica. El subtipo histológico alveolar suele causar lesiones en las extremidades en niños de mayor edad. Los sitios metástasicos más frecuentes son el pulmón, la médula ósea, el hueso y los ganglios linfáticos. Describimos el caso de un paciente con rabdomiosarcoma alveolar (RA) con metástasis cardíaca, una presentación poco frecuente de la patología.

Rhabdomyosarcoma is the most common malignant soft tissue tumor in pediatric age. It can affect any anatomical location. Alveolar histological subtype usually presents lesions on the extremities in older children. The most common metastatic sites are the lung, bone marrow, bone and lymph node. We describe a case of alveolar rhabdomyosarcoma with cardiac metastasis in a pediatric patient, a rare presentation of the pathology.

Ossifying fibromyxoid tumor of the oral cavity: rare case report and long-term follow-up

Ossifying fibromyxoid tumor (OFMT) is a rare mesenchymal soft tissue benign neoplasm with an uncertain line of differentiation, which arises most frequently in extremities. The head and neck region involvement is uncommon, with only ten intraoral cases published in the English-language literature. One additional case of OFMT is reported here, including a literature review of intraoral reported cases. A 45-year-old female patient presented a painless nodule involving the buccal mucosa of approximately two years duration, measuring nearly 1.3 cm in maximum diameter. The main histopathological features include ovoid to round cells embedded in a fibromyxoid matrix with a perpheral shell of lamellar bone. Immunohistochemically, the tumor showed immunoreactivity for vimentin and S100. No recurrence has been detected after 7 years of follow-up.

Cervical Infantile Fibrosarcoma: a rare cause of paediatric parapharyngeal neck mass

Soft tissue tumors are not uncommon in childhood and comprise entities that range from common to very rare malignancies. Infantile fibrosarcoma (IFS) is a rare pediatric malignancy mainly seen in the first two years of life. The data about the incidence of infantile fibrosarcoma occurring in the neck in the Indian subcontinent is scarce. To the best of our knowledge, only one case of infant cervical IFS has been reported previously in the Indian subcontinent. We present another case of an eight-year-old male patient with a rapidly growing mass on the left side of the neck. He was successfully treated with a combined modality of surgery and chemotherapy with a good outcome. Among the soft tissue tumors of childhood, IFS is a rare entity. It has a good prognosis and lesser chance of distant metastasis as compared to adult fibrosarcoma. Though surgical excision is the mainstay of treatment, chemotherapy also has a significant role in the treatment of primary tumor and metastasis. We discuss the stated case to bring to the notice this uncommon cause, which can be considered as a differential diagnosis of upper cervical swellings. A better understanding of this entity would help in early diagnosis and aggressive treatment, reducing the overall morbidity and mortality.

Hamartoma fibroso de la infancia umbilical: reporte de un caso / Umbilical fibrous hamartoma of infancy: a case report

Resumen: Introducción: el hamartoma fibroso de la infancia (HFI) es un tumor benigno de partes blandas que se presenta generalmente en población infantil y que posee una morfología histológica característica. Objetivo: describir un caso de HFI congénito de características clínicas e histológicas atípicas. Caso Clínico: recién nacido de término, sexo masculino, sin antecedentes mórbidos perinatales, es deriva do a dermatología por placa eritematosa congénita en región umbilical. Estudio histológico evidenció proliferación fusocelular en dermis e hipodermis, de morfología bifásica, con un patrón arremolina do infiltrante y otro de bandas de células fusadas con hábitos fibroblásticos y miofibroblásticos, aso ciada en profundidad a un componente de tejido adiposo maduro. El estudio inmunohistoquímico mostró positividad difusa a CD34 y focalmente para FXIIIa, con ausencia de inmunoreactividad a ac- tina, desmina, MyoD1, S100, HMB45, Melan A y EMA. Fluorescent in situ hybridization (FISH) para platelet-derived growth factor beta (PDGF beta) y para el gen ETV6 negativos, presentes en el dermatofibrosarcoma protuberans congénito y fibrosarcoma infantil, respectivamente. Estos antecedentes, sumado a los hallazgos histológicos previos, apoyaron el diagnóstico de HFI. Se realizó extirpación quirúrgica, sin signos de recidiva durante el seguimiento clínico. Conclusión: es importante consi derar el HFI dentro del diagnóstico diferencial de tumores subcutáneos infantiles, principalmente en población menor de 2 años. Si bien su comportamiento es benigno, presenta similitud con múltiples lesiones benignas y malignas, lo que hace imperativo realizar un estudio histológico exhaustivo ante lesiones clínicas sospechosas.

Abstract: Introduction: Fibrous hamartoma of infancy (FHI) is a benign, soft tissue tumor that usually oc curs in children and has a characteristic histological morphology. Objective: To describe a case of congenital FHI with atypical histological and clinical characteristics. Clinical case: Full-term male newborn, with no perinatal morbid history was referred to dermatology due to a congenital erythe matous plaque in the umbilical region. The histological study showed a fusocelullar proliferation in dermis and hypodermis of biphasic distribution, with an infiltrative, swirling pattern and bundles of spindle fibroblast-like and myofibroblast-like cells, associated in depth with a mature adipose tissue component. The immunohistochemical study revealed diffuse positivity for CD34, and focal posi tivity for FXIIIa, without immunoreactivity for actin, desmin, MyoD1, S100, HMB45, Melan-A, or EMA. Fluorescent in situ hybridization (FISH) was negative for platelet-derived growth factor recep tor beta (PDGFR-beta) and for ETV6 gene. PDGFR-beta and ETV6 gene are present in congenital dermatofibrosarcoma protuberans and infantile fibrosarcoma, respectively. This history, in addition to previous histological findings, supported the diagnosis of FHI. Surgical resection was performed, without signs of recurrence during clinical follow-up. Conclusion: It is important to consider the FHI within the differential diagnosis of subcutaneous tumors in children, especially in those under two years of age. Although its behavior is benign, it is similar to multiple benign and malignant le sions, which makes it imperative to perform a histological study in front of suspicious clinical lesions.

Inflammatory myofibroblastic tumor of the prostate after transurethral resection of the prostate with negative expression of anaplastic lymphoma kinase: a case report

ABSTRACT CONTEXT: Inflammatory myofibroblastic tumors are a rare type of soft-tissue tumor. Inflammatory myofibroblastic tumors are characterized by rearrangements involving the anaplastic lymphoma kinase gene locus on 2p23. Case Report: We report the case of a 67-year-old Chinese male who presented with dysuria and fever. Magnetic resonance imaging showed an irregular prostatic mass with an isointense signal and obscure boundary. Histopathological evaluation showed that the mass consisted mainly of spindle-shaped cells. Immunohistochemical evaluation showed that the tumor cells were negative for anaplastic lymphoma kinase. CONCLUSIONS: Inflammatory myofibroblastic prostate tumors are rare lesions with unclear etiology. The pathological diagnosis is very important.

Giant atypical lipoma

Abstract: Liposarcomas correspond to the most common histological subtype of soft tissue sarcomas. They can be subdivided into: well differentiated or atypical lipoma, undifferentiated, myxoid, round, and pleomorphic cells. Atypical lipomas are the most prevalent and usually appear as asymptomatic softened tumors. They are locally aggressive but rarely lead to distant metastases. The diagnosis of this tumor is based on the imaging and histopathologic findings. Treatment consists of excision surgery with complete tumor removal. It has a good prognosis due to the low percentage of distant metastases. We report a rare case of giant atypical lipoma as well as the adopted therapy and evolution.

Epithelioid sarcoma with spontaneous pneumothorax and massive pleural effusion

No abstract available.

Granulomatous slack skin T-cell lymphoma: an important differential diagnosis with giant cell tumor of soft tissue

Abstract: Granulomatous slack skin is an indolent T-cell lymphoma, considered to be a variant of mycosis fungoides. Clinically it is characterized by areas of redundant skin, wrinkled, inelastic, with variable erythema and infiltration besides a poikilodermic surface. A differential diagnosis unknown to most dermatologists is the giant cell tumor of soft tissue, which is an extremely rare low-grade sarcoma. The authors report a patient who had undergone extensive surgery because of a primary diagnosis of giant cell tumor of soft tissue, but which proved to be granulomatous slack skin after a second interventional procedure with confirmatory histopathology.

Evolución infrecuente de sinoviosarcoma de muslo / Uncommon evolution after excision of a thigh synovial sarcoma

Background: Synovial sarcoma is a soft tissue tumor with a high degree of local and metastatic invasion. Case report: We report a 26 years old smoker woman with a history of a synovial tumor excised from the right thigh, who required a hip prosthesis for a pathological fracture due to metastases. Two years after, a lung metastasis in the left upper lobe was excised and treated with chemo and radiotherapy. Two years later a new lung nodule was found and excised. Pathology confirmed that they were metastases of the primary tumor. Three months after this last excision, the patient is asymptomatic.

Introducción: El sinoviosarcoma es una neoplasia de partes blandas con alto grado de invasión local y producción de metástasis. Caso clínico: Mujer de 26 años con 2 episodios secuenciales de metástasis pulmonar a lo largo de 6 años posterior al tratamiento del tumor primario. Patología de tratamiento muy complejo.

Lipoblastoma benigno de membro superior: relato de caso e revisão da literatura / Benign lipoblastoma of the upper limb: a case report and literature review

O lipoblastoma é um tumor mesenquimal raro, composto de lipoblastos que continuam sua proliferação após o período pós-natal e que acometem, predominantemente, a população pediátrica. Apresenta prognóstico excelente, apesar do potencial de invasão local e do crescimento rápido. Os autores relatam o caso de uma paciente pediátrica portadora de volumosa lesão em antebraço direito, ocasionando importante comprometimento funcional do membro acometido. Aspectos relevantes no diagnóstico diferencial e manejo são discutidos neste trabalho, visto tratar-se de lesão com potencial risco incapacitante futuro, caso não manejada corretamente.

Lipoblastoma is a rare mesenchymal tumor occurring primarily in pediatric patients and formed by lipoblasts that proliferate after the postnatal period. Despite its potential for local invasion and rapid growth, its prognosis is excellent. In this study, we report the case of a pediatric patient with a ponderous lesion in the right forearm that caused considerable functional impairment of the affected limb. We also discuss the relevant aspects concerning the differential diagnosis and management of the disease, as it has the potential to cause incapacity without proper treatment.

Comparative study of planned and unplanned excisions for the treatment of soft tissue sarcoma of the extremities

OBJECTIVE: Unplanned excision of soft tissue sarcomas is common because benign soft tissue lesions are very frequent. This study evaluated the impact of unplanned resections on overall survival, local recurrence and distant metastasis in patients with soft tissue sarcomas of the extremities. METHODS: In total, 52 patients who were diagnosed with soft tissue sarcomas between May 2001 and March 2011 were analyzed in a retrospective study. Of these patients, 29 (55.8%) had not undergone previous treatment and the remaining 23 (44.2%) patients had undergone prior resection of the tumor without oncological planning. All subsequent surgical procedures were performed at the same cancer referral center. The follow-up ranged from 6 to 122 months, with a mean of 39.89 months. Age, lesion size and depth, histological grade, surgical margins, overall survival, local and distant recurrence and adjuvant therapies were compared. RESULTS: Residual disease was observed in 91.3% of the re-resected specimens in the unplanned excision group, which exhibited greater numbers of superficial lesions, low histological grades and contaminated surgical margins compared with the re-resected specimens in the planned excision group. No differences were observed in local recurrence and 5-year overall survival between the groups, but distant metastases were significantly associated with planned excision after adjustment for the variables. CONCLUSIONS: There was no difference between patients undergoing unplanned excision and planned excision regarding local recurrence and overall survival. The planned excision group had a higher risk of distant metastasis, whereas there was a high rate of residual cancer in the unplanned excision group. .

Poorly differentiated synovial sarcoma in the wrist - Case report

Synovial sarcomas are rare malignant tumors affecting mainly young adults, presenting as a slow growth mass located in deep soft tissues of extremities, near the joints. In this report a 34-year-old male patient, presented an ulcerovegetative lesion on the right wrist which was completely excised. Histopathology and immunohistochemistry confirmed synovial sarcomas with poorly differentiated cells. This patient presented 11 months later with ipsilateral axillary lymph node metastasis, which emphasizes the unfavorable prognosis of this synovial sarcoma variant. The indolent growth pattern of this sarcoma justifies the well circumscribed initial stages, which progressively infiltrate adjacent structures with lung metastasis (80%) and lymph node involvement (20%) and thus corroborates the importance of early diagnosis and proper treatment.

Superficial Acral Fibromyxoma involving the nail's apparatus. Case report and literature review

Superficial Acral Fibromyxoma is a rare tumor of soft tissues. It is a relatively new entity described in 2001 by Fetsch et al. It probably represents a fibrohistiocytic tumor with less than 170 described cases. We bring a new case of SAF on the 5th toe of the right foot, in a 43-year-old woman. After surgical excision with safety margins which included the nail apparatus, it has not recurred (22 months of follow up). We carried out a review of the location of all SAF published up to the present day.

Soft-tissue masses as presentation of non-Hodgkin's lymphoma in AIDS patients / Massas de tecidos moles como apresentacao do linfoma nao-Hodgkin em pacientes com AIDS

Primary soft tissue Non-Hodgkin lymphomas are very rare and account only for 0.1 % of the cases. Generally, Non-Hodgkin lymphomas of the soft tissue present as large subcutaneous masses without evidence of nodal or skin involvement. We describe four cases of primary Non-Hodgkin lymphomas of the soft tissue in patients infected with the human immunodeficiency virus. The most common site of involvement was the chest wall in all the patients; histopathological and immunophenotypic examination of the biopsy smears revealed two cases of plasmablastic lymphomas, one Burkitt and one diffuse large B-cell lymphoma. Non-Hodgkin lymphomas should be included in the differential diagnosis of soft tissue masses in human immunodeficiency virus - seropositive patients.

Os linfomas Não-Hodgkin primários de tecidos moles são muito raros e responsáveis por somente 0,1% dos casos. Geralmente, os linfomas Não-Hodgkin de tecidos moles se apresentam como massas subcutâneas sem evidência de comprometimento dos nódulos ou da pele. Descrevemos aqui quatro casos de linfomas Não-Hodgkin primário de tecidos moles em pacientes infectados pelo vírus da imunodeficiência humana. O local mais comum de comprometimento foi a parede torácica em todos os pacientes; os exames histopatológico e imunofenotípico do esfregaço da biópsia revelaram dois casos de linfoma plasmablástico, um linfoma de Burkitt e um linfoma difuso de grandes células B. O linfoma Não-Hodgkin deve ser incluído no diagnóstico diferencial de massas de tecidos moles nos pacientes soropositivos para vírus da imunodeficiência humana.

Proximal-type epithelioid sarcoma - Case report / Sarcoma epitelióide tipo proximal - Relato de caso

Epithelioid sarcoma, first described by Enzinger in 1970, is a rare soft-tissue sarcoma typically presenting as a subcutaneous or deep dermal mass in distal portions of the extremities of adolescents and young adults. In 1997, Guillou et al. described a different type of epithelioid sarcoma, called proximal-type epithelioid sarcoma, which is found mostly in the pelvic and perineal regions and genital tracts of young to middle-aged adults. It is characterized by a proliferation of epithelioid-like cells with rhabdoid features and the absence of a granuloma-like pattern. In this paper we present a case of proximal-type epithelioid sarcoma with an aggressive clinical course, including distant metastasis and death nine months after diagnosis.

O sarcoma epitelióide, primeiramente descrito por Enzinger, em 1970, é uma neoplasia de partes moles que ocorre principalmente nas extremidades distais de adolescentes e adultos jovens. Em 1997, Guillou e cols. descreveram um tipo diferente de sarcoma epitelióide, que afetava frequentemente a região pélvica, períneo e áreas genitais de pacientes de média idade, com exame histológico caracterizado pela proliferação de células com aspecto epitelióide. Neste trabalho, descreve-se caso de paciente que apresentava há três meses duas lesões na região glútea, cujo exame histológico confirmou diagnóstico de sarcoma epitelioide do tipo proximal, já com presença de metástases pulmonares e cerebrais e que foi a óbito nove meses após o diagnóstico.