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La histiocitosis de células de Langerhans es una expresión de células dendríticas mieloides, asociada a un componente inflamatorio significativo y compromiso sistémico variado. La edad más frecuente de presentación es entre 1 y 4 años, y predomina en el sexo masculino. Se comunica el caso de un niño de 5 años de edad cuya forma de presentación fue una lesión granulomatosa con fístula perianal, afectación pulmonar y de oído externo. El abordaje interdisciplinario permitió llegar al diagnóstico, realizar las intervenciones necesarias e iniciar el tratamiento adecuado.
Langerhans cell histiocytosis is an expression of myeloid dendritic cells, associated with a significant inflammatory component and varied systemic involvement. The most common age at presentation is between 1 and 4 years, and it prevails among male subjects. Here we describe the case of a 5-year-old boy who presented with a granulomatous lesion with perianal fistula and lung and external ear involvement. An interdisciplinary approach helped to make a diagnosis, provide the necessary interventions, and start an adequate treatment.
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Humanos , Masculino , Preescolar , Histiocitosis de Células de Langerhans/complicaciones , Histiocitosis de Células de Langerhans/diagnóstico , Diagnóstico DiferencialRESUMEN
RESUMEN La enfermedad de Rosai-Dorfman cutánea (ERDC) es una rara proliferación reactiva de histiocitos, que cursa con lesiones cutáneas sin compromiso generalizado. Las manifestaciones clínicas cutáneas son diversas y la variante clínica "tipo tumoración" es la forma más infrecuente. Se describe el caso de un paciente con ERDC que se presentó con esta forma inusual.
ABSTRACT Cutaneous Rosai-Dorfman disease (CRDD) is a rare reactive histiocytic proliferation, which presents with skin lesions without systemic involvement. The clinical cutaneous manifestations are diverse and the "tumor-like" clinical variant is the most infrequent. We describe the case of a patient with CRDD who presented with this unusual form.
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ABSTRACT A 42-year-old woman presented with bilateral proptosis, chemosis, leg pain, and vision loss. Orbital, chorioretinal, and multi-organ involvement of Erdheim-Chester disease, a rare non-Langerhans histiocytosis, with a negative BRAF mutation was diagnosed based on clinical, radiological, and pathological findings. Interferon-alpha-2a (IFNα-2a) was started, and her clinical condition improved. However, 4 months later, she had vision loss with a history of IFNα-2a cessation. The same therapy was administered, and her clinical condition improved. The Erdheim-Chester disease is a rare chronic histiocytic proliferative disease that requires a multidisciplinary approach and can be fatal if left untreated because of multisystemic involvements.
RESUMO Uma mulher de 42 anos apresentou proptose bi-lateral, quemose, dor nas pernas e perda de visão. Com base em achados clínicos, radiológicos e patológicos, foi diag-nosticada doença de Erdheim-Chester com acometimento orbitário, coriorretiniano e multiorgânico. Trata-se de uma rara histiocitose não Langerhans negativa para a mutação BRAF. Foi iniciado tratamento com interferon alfa-2a (IFNα-2a) e o quadro clínico melhorou. No entanto, quatro meses depois, a paciente apresentou perda visual após a cessação do IFNα-2a. A mesma terapia foi administrada novamente e sua condição clínica melhorou novamente. A doença de Erdheim-Chester é uma doença proliferativa histiocítica crônica rara que necessita de uma abordagem multidisciplinar e pode ser fatal se não tratada, devido a envolvimentos multissistêmicos.
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ABSTRACT Langerhans cell histiocytosis (LCH) is a disease with unknown etiology. It presents as single-system (affecting a single organ or tissue) or as multisystem (with or without risk organ involvement). The oral cavity may be involved or be the site of the first manifestation Aim To describe, group, and determine the frequency of oral lesions in pediatric patients with LCH, and to relate these lesions to age and the different disease subtypes Materials and Method Clinical and radiographic examinations were used to evaluate 95 patients diagnosed with LCH, aged 0 to 16 years, who were referred to the Department of Comprehensive Pediatric Dentistry at the School of Dentistry, University of Buenos Aires. Clinical histories were prepared and informed consents obtained. Lesions were diagnosed by observation, palpation and biopsies, and grouped according to affected tissues into bone, mucosal, and bone-mucosal Results 42.1% presented oral lesions, and in 14.73%, these lesions were the first manifestation of LCH. Ninety percent presented only bone lesions, while the remaining 10% presented bone-mucosal and mucosal lesions. In the single-system subtype, 52.5% presented bone lesions. In the multisystem subtypes (with or without risk organs), all three types of lesions were found. The association between age at which LCH was diagnosed and oral tissue involvement showed that bone-mucosal lesions occur in young children (average age 1.4 years) diagnosed with multisystem LCH. Oral mucosa was only affected in reactivations of the disease Conclusions A high frequency of oral lesions was observed, which were sometimes the first manifestation of the disease, most often affecting bone tissue. Dentists can play an active role in the initial diagnosis of the disease.
RESUMEN La Histiocitosis de células de Langerhans (LCH) (Langerhans cell histiocytosis) es una enfermedad de etiología aún desconocida. Se presenta en forma unisistémica (afecta un solo órgano o tejido) o multisistémica (con o sin órganos de riesgo afectados). La cavidad bucal puede estar comprometida o ser el sitio de la primera manifestación Objetivo describir, agrupar y determinar la frecuencia de las lesiones bucales de pacientes pediátricos con LCH, relacionarlas con la edad y los diferentes subtipos de la enfermedad Materiales y Método se evaluaron mediante exámenes clínicos y radiográficos 95 pacientes entre 0 y 16 años con diagnóstico de LCH, derivados a la Cátedra de Odontología Integral Niños, Facultad de Odontología, Universidad de Buenos Aires. Se confeccionaron historias clínicas y se obtuvieron los consentimientos informados. Las lesiones fueron diagnosticadas a través de observación, palpación y biopsias, y se agruparon según los tejidos afectados en óseo, mucoso y óseo-mucoso Resultados el 42.1% presentó lesiones bucales y en el 14.73% estas fueron la primera manifestación de LCH. El 90% mostró solo lesiones óseas, mientras que en el 10 % restante se observaron lesiones óseo-mucosas y mucosas. En el subtipo unisistémico el 52.5% presentó lesiones óseas. En los subtipos multisistémicos, "con" o "sin" órganos de riesgo, se hallaron los tres tipos de lesiones. La relación entre la edad de diagnóstico de LCH y el compromiso de tejidos bucales evidenció que las lesiones óseo-mucosas ocurren en niños pequeños (edad promedio 1.4 años) con diagnóstico de LCH multisistémica. La mucosa bucal solo se vio afectada en las reactivaciones de la enfermedad Conclusiones Se observó una alta frecuencia de lesiones bucales, siendo en ocasiones la primera manifestación de la enfermedad, afectando con mayor frecuencia al tejido óseo. El odontólogo puede desempeñar un rol activo en el diagnóstico inicial de la enfermedad.
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The diverse clinical manifestations of Langerhans cell histiocytosis (LCH) present a dilemma to clinicians and pediatricians play an important role in its diagnosis and multidisciplinary approach. LCH, previously known as histiocytosis X, is an uncommon hematological disorder characterized by uncontrolled stimulation and proliferation of normal antigen-presenting cells, Langerhans cells. The purpose of this report is to describe the case of a 7-month-old female child with multisystem involvement who presented with breath-holding spells and to discuss the clinical, radiological, and histopathological features of LCH.
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La Histiocitosis de Células de Langerhans (HCL) es una enfermedad poco común caracterizada por la proliferación clonal de células dendríticas inmaduras que infiltran de forma local o difusa a distintos sistemas, y que afecta principalmente a niños. Presentamos el caso de un hombre de 38 años con historia de caída de múltiples piezas dentales de larga data, sin asociación a traumatismo, tabaquismo ni a mala higiene dental. Tomografía Computada (TC) de cráneo que mostró múltiples lesiones líticas mandibulares. El resultado de biopsia mandibular e inmunohistoquímica eran compatibles con el hallazgo de HCL. Durante su evolución, cursa con poliuria, polidipsia y nicturia, confirmando mediante estudio hormonal diabetes insípida y panhipopituitarismo. Resonancia Magnética (RM) cerebral muestra neoplasia hipotalámica con compromiso infundibular e imagen sugerente de granuloma hipofisiario. Se decide defocación maxilobucofacial, suplementación hormonal, junto con quimioterapia y radioterapia. El paciente evolucionó favorablemente.
Langerhans-cells Histiocytosis (LCH) is a rare disease characterized by the clonal proliferation of immature dendritic cells that locally or diffusely infiltrate different systems, mainly affecting children. We present the case of a 38-year-old man with a long-standing history of multiple tooth loss without association with trauma, smoking, or poor dental hygiene. Skull computed tomography (CT) showed multiple lytic jaw lesions. Jaw biopsy and immunohistochemical results were compatible with the finding of LCH. The patient evolved with polyuria, polydipsia, and nocturia, confirming the presence of diabetes insipidus and panhypopituitarism through hormonal studies. Magnetic resonance imaging (MRI) of the brain shows a hypothalamic neoplasm with infundibular involvement and an image suggestive of a pituitary granuloma. The treatment consisted of maxillobuccofacial defocusing, hormonal supplementation, chemotherapy, and radiotherapy with favorable evolution.
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Since the 1970s， patients with chronic pancreatitis （CP） have benefited from total pancreatectomy with autologous islet cell transplantation （TPAIT）. With the continuous development of surgical techniques and perioperative management over the past few decades， there have been improvements in islet cell function， insulin independence rate， and the survival rate of patients. This article summarizes the preoperative indications for TPAIT， the development of surgical operations， postoperative management and monitoring， and prognosis， so as to help clinicians learn more about TPAIT.
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Objective:To investigate the role of miR-146a in regulating the homeostasis and function of epidermal Langerhans cells (LCs).Methods:Fresh and in vitro cultured epidermal LCs were isolated and purified by flow cytometry (FCM). The expression of miR-146a in LCs was detected by quantitative PCR (qPCR). The percentages of epidermal LCs in wild-type (WT) and miR-146a conventional knockout (miR-146a cKO) mice were analyzed by FCM. The expression of major histocompatibility complex Ⅱ (MHCⅡ) and co-stimulatory molecules (CD86 and CD80) was analyzed by FCM to evaluate the effect of miR-146a on the maturation of LCs. The percentage of Dextran-FITC + LCs was detected by FCM to evaluate the effect of miR-146a on the phagocytic function of LCs. In vitro and in vivo experiments were used to analyze the ability of miR-146a-deficient and -sufficient LCs to stimulate the proliferation of CD8 + OT-ⅠT cells and CD4 + OT-Ⅱ T cells. Results:The expression of miR-146a was significantly increased in mature LCs than in the freshly isolated LCs. There was no significant difference in the number of epidermal LCs between wild-type (WT) and miR-146a cKO mice. After a 48 h culture in vitro, the expression of MHCⅡ, CD86 and CD80 in the epidermal LCs of miR-146a cKO mice was similar to that of WT mice. Moreover, miR-146a deletion had no significant influence on antigen uptake by LCs. However, miR-146a deficiency enhanced the antigen-presenting ability of LCs that could stimulate the proliferation of OVA-specific CD8 + OT-Ⅰ T cells and CD4 + OT-Ⅱ T cells. Conclusions:miR-146a had no influence on the homeostasis, maturation and phagocytosis of LCs, but enhanced the antigen-presenting function.
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Erdheim-Chester disease is a rare non-Langerhans histiocytic disease that can involve multiple systems, such as bone and joint, nerve, skin, large blood vessels and endocrine.The most common clinical manifestation is slight bone pain around the lower limb joints. The data reported a patient with multiple serous cavity effusion as the first manifestation and lack of symptoms of bone pain. PET-CT examination showed that the bone and large blood vessels were involved, and finally confirmed as Erdheim-Chester disease by bone biopsy pathology. The patient presented atypical manifestations of rare diseases, and the analysis of clinical data of the case will help improve the recognition of the disease by clinicians.
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Type 1 diabetes mellitus (T1DM) is an organ-specific disease characterized by autoimmune damage to pancreatic β cells. Insulin therapy is the most basic and important treatment for T1DM, but insulin therapy cannot fundamentally terminate or improve the main cause of T1DM, namely the disorder of the immune regulation mechanism. With the advancement of science and technology, the continuous development of new insulin and hypoglycemic drugs has provided better means for glycemic control. Pancreas transplantation, islet transplantation, immunotherapy, and cell therapy have provided hope for the prevention or reversal of T1DM. It is of great significance to understand the current situation and future of new technologies for T1DM treatment for the research and management of T1DM patients.
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Ocular histiocytosis is a rare and heterogeneous group of disorders which can occur in children and adults. There is a great challenge in the diagnosis and treatment because of the atypical clinical and imaging manifestations. With insights into molecular mechanism of histiocytosis, the discovery of BRAFV600E mutations has changed the understanding of this disease and enabled targeted therapies in most patients. The gold standard of diagnosis has developed into histopathological biopsy combined with the testing for mutations. Surgery is not the only treatment for ocular histiocytosis and targeted therapy has become an effective treatment for patients with mutations in MAPK-ERK signal-regulated kinase pathway. However, the greatest challenge for ocular histiocytosis is establishing the early and correct diagnosis due to the diverse types and clinical manifestations. Therefore, this article reviews recent progress in diagnosing and treating ocular histiocytosis, summarizes their clinical and pathological features, and aims to improve the level of diagnosis and treatment among clinicians.
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Langerhans cell histiocytosis (LCH) is a rare disease characterized by the proliferation of Langerhans cells and the destruction of local tissue. LCH large occurs in children, whilst incidence of the elderly population is extremely low, and there are few related studies. LCH lesions can involve multiple organs and systems, including bone tissue, lymph nodes, skin, liver, and spleen. However, it is rare that multiple soft tissues are implicated for eldly patients with LCH and present with soft tissue mass as the main manifestation. Here is a report on the clinical features, treatment and prognosis of an elderly LCH with multiple soft tissue masses as the main manifestation, in order to provide clinical reference.
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Objective To analyze the clinical characteristics of thyroid LCH to enhance understanding of the disease. Methods We retrospectively studied the clinical data from six thyroid LCH patients who hospitalized in Huashan Hospital Affiliated to Fudan University from January 2015 to January 2022.We analyzed the ultrasound and 18F FDG-PET/CT imaging characteristics of thyroid LCH. Results The six patients diagnosed (2 males and 4 females) were between 18 and 58 years old.All patients had diabetes insipidus.MRI revealed thickened pituitary stalk.Two cases had central hypothyroidism, while four cases euthyroidism.Three cases tested positive for thyroid antibodies.Ultrasound showed thyroid nodules of TI-RADS 3 in three cases, TI-RADS 4 in two cases, and 1 with nodular goiter.Ultrasound showed that all sic cases indicated low echogenicity, 5 of which clear boundaries, 4 of which uneven echo distribution, 5 of which irregular shape, and noen has calcification.18F FDG-PET/CT indicated high uptake nodules with SUVmax values all above 10.4 cases were diagnosed by surgical excision and the other 2 by coarse-needle aspiration biopsy.When diagnosed, two cases had liver and thymus involvement respectively.One case had lung and bone involvement respectively.After treatment, 4 cases showed that nodular goiter shrank, while the other two with liver involvement progressed fast and no assessment made. Conclusions Thyroid LCH presented low echogenicity, clear boundaries, irregular shape, without calcification, and high uptake in 18F FDG-PET/CT.A definite diagnosis of pituitary stalk thicking accompanied by thyroid nodules, especially those with hypoechoic and irregular nodules, can be achieved by coarse-needle aspiration biopsy and langerin-specific pathological staining.
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Langerhans cell histiocytosis (LCH) is a group of unexplainable abnormal proliferation and aggregation of Langerhans cell. LCH can be classified into four clinical variants: Letterer-Siwe disease, Hand-Schüller-Christian disease, eosinophilic granuloma, and congenital self-healing LCH. LCH is most prevalent in children. Lesions can be localized in a single system or multiple organs, and clinical manifestations vary depending on the affected organs. The skin and mucocutaneous tissues are the starting point of the affected tissue. This study presents a LCH case characterized by transient self-healing. This case can further provide references for the clinical diagnosis and treatment of LCH.
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Niño , Humanos , Histiocitosis de Células de Langerhans/terapia , Diagnóstico DiferencialRESUMEN
Langerhans cell histiocytosis (LCH) also known as histiocytosis X, is a rare systemic disorder arising from the clonal proliferation of myeloid dendritic cells (histiocytes) with a tendency to involve single or multiple organ systems with variable clinical course and prognosis. Clinical presentation usually depends on the site of involvement. The organs commonly affected in adults by order of decreasing frequency include lungs, bone, skin, pituitary glands, lymph nodes, and the liver. Vulval and perianal involvement is extremely rare in adults. We describe the case of a 31-year-old non-smoker adult female with multisystemic LCH involving the vulva, perianal region, and lung. Probable involvement of other sites with LCH included mandibular bone, pituitary gland, skin, lymph nodes, liver, thyroid, and colon. She is undergoing systemic chemotherapy and has completed two cycles of cytarabine and steroids without any complications. Treatment is not standardized due to the very less incidence of the disease and inadequate knowledge regarding its pathophysiology. Langerhans cell histiocytosis remains a major concern for treating physicians because of its rarity with many faces and requires careful consideration for management.
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Abstract Langerhans cells histiocytosis is a rare disease characterized by monoclonal proliferation and migration of special dendritic cells in a variety of organs, most commonly appears eosinophilic granuloma localized, often solitary, and bone lesions that occurs predominantly in pediatric patients. Although is most prevalent in children under the age of 15, this disorder presents in all ages and occurs at a rate of 2 to 5 cases per million per year. LCH is a complex entity; the clinic manifestations can mimic other common conditions and therefore a comprehensive evaluation is indicated. Since oral manifestations are frequent, the early diagnose of this pathology could be detected by dental professionals. The aim of this case report is to describe a case of LCH who initially was misdiagnosed and treated for a dental infection. This disease requires accurate histopathological diagnosis and timely treatment; hence it is necessary to raise awareness among dentists to avoid misdiagnose of oral manifestations of LCH.
Resumen La histiocitosis de las células de Langerhans es una enfermedad poco frecuente que se caracteriza por la proliferación monoclonal y la migración de células dendríticas especiales en una variedad de órganos; lo más común es que aparezca un granuloma eosinofílico localizado, a menudo solitario, así como lesiones óseas que se producen predominantemente en pacientes pediátricos. Aunque es más frecuente en los niños menores de 15 años, este trastorno se presenta en todas las edades y se produce a una tasa de 2 a 5 casos por millón al año. La HCL es una entidad compleja; las manifestaciones clínicas pueden imitar otras afecciones comunes y, por lo tanto, se indica una evaluación exhaustiva. Dado que las manifestaciones orales son frecuentes, el diagnóstico precoz de esta patología podría ser detectado por los profesionales de la odontología. El objetivo de este reporte de caso es describir un caso de HCL que inicialmente fue mal diagnosticado y tratado por una infección dental. Esta enfermedad requiere un diagnóstico histopatológico preciso y un tratamiento oportuno; por lo tanto, es necesario sensibilizar a los dentistas para evitar un diagnóstico erróneo de las manifestaciones orales de la HCL.
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Humanos , Masculino , Niño , Histiocitosis de Células de Langerhans/diagnósticoRESUMEN
INTRODUCCIÓN El granuloma eosinofílico (GE) es una patología infrecuente, sobre todo en adultos, que puede afectar la columna cervical. A pesar de la vasta literatura, esta enfermedad afecta principalmente a la población infantil, y no hay un consenso sobre el manejo en adultos. Con el objetivo de aportar conocimiento respecto a esta patología poco frecuente, se presenta un caso clínico de GE cervical en un paciente de 16 años, a quien se trató de manera conservadora, con buenos resultados y retorno completo a sus actividades. CASO CLÍNICO Un hombre de 16 años, seleccionado de rugby, consultó por dolor cervical axial persistente y nocturno de 6 semanas de evolución, sin trauma evidente. Al examen, destacó dolor a la compresión axial sin compromiso neurológico asociado. Los exámenes de tomografía computarizada (TC) y resonancia magnética (RM) revelaron lesión lítica en el cuerpo de C3 de características agresivas, de presentación monostótica en tomografía por emisión de positrones-tomografía computada (TEP-TC) compatible con tumor primario vertebral. Se decidió realizar biopsia percutánea bajo TC, para definir el diagnóstico y manejo adecuado, la cual fue compatible con células de Langerhans. Al no presentar clínica ni imagenología de inestabilidad ósea evidente o compromiso neurológico, se manejó con tratamiento conservador, inmovilización cervical, analgesia oral, y seguimiento estrecho. A los cuatro meses de evolución, se presentó con una TC con cambios reparativos del cuerpo vertebral y sin dolor, y logró retomar sus actividad habituales. CONCLUSIONES El diagnóstico de GE es infrecuente a esta edad, y se debe plantear entre diagnósticos diferenciales de lesiones líticas agresivas primarias vertebrales. Es necesario el uso de imágenes, y la biopsia vertebral es fundamental para confirmar el diagnóstico. Su manejo va a depender de la sintomatología, del compromiso de estructuras vecinas, y de la estabilidad de la vértebra afectada. El manejo conservador con seguimiento clínico e imagenológico es una opción viable.
INTRODUCTION Eosinophilic granuloma (EG) is a rare, tumor-like lesion, infrequently affecting the cervical spine, particularly in adults. Although vastly described in literature, this pathology mainly affects children, and there is still no consensus on its treatment in older patients. With the goal of contributing to increase the knowledge regarding this infrequent pathology, we present a case of a C3 eosinophilic granuloma in a 16-year-old patient, who was treated conservatively, with good results, including complete return to his previous activities. CLINICAL CASE a 16-year-old male, elite rugby player, presented with a history of persistent neck pain, mainly at night, with no previous trauma. Upon physical examination, he reported neck pain with axial compression of the head, without neurological impairment. Both computed tomography (CT) and magnetic resonance imaging (MRI) scan revealed an aggressive lytic lesion in the C3 vertebral body, a with monostotic presentation on positron emission tomography-computed tomography (PET-CT) compatible with a primary spine tumor. A CT-guided percutaneous biopsy was obtained to establish the diagnosis and provide the proper management. The results were compatible with Langerhans cells. As he presented no symptoms or imaging findings of evident bone instability, as well as no neurological impairment, the patient was treated conservatively, with a cervical brace, oral pain medication and close followup. A CT obtained after four months of treatment showed reparative changes of the C3 vertebral body; at this point, the patient reported no neck pain, so he was able to return to his previous activities. CONCLUSIONS Although an EG is rare at this age, it should be considered in the differential diagnosis of primary vertebral aggressive lytic lesions. Imaging and a vertebral biopsy are paramount to confirm the diagnosis. The treatment modality depends on the symptoms, the involvement of adjacent structures, and the stability of the affected vertebra. Conservative management including clinical and imaging followup is a viable option.
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Humanos , Masculino , Adolescente , Enfermedades de la Columna Vertebral/diagnóstico por imagen , Granuloma Eosinófilo/diagnóstico por imagen , Enfermedades de la Columna Vertebral/terapia , Imagen por Resonancia Magnética/métodos , Tomografía Computarizada por Rayos X/métodos , Granuloma Eosinófilo/terapiaRESUMEN
Introducción: Las histiocitosis son enfermedades raras, caracterizadas por la infiltración tisular de histiocitos anormales. Se dividen en cinco grupos. Son frecuentes en la población pediátrica. La combinación de la histiocitosis de células de Langerhans e histiocitosis de células no-Langerhans es fortuita. Reporte de caso: Se reporta el caso de una paciente de 66 años que debutó con un cuadro de compromiso sistémico, del que llamó la atención la presencia de masas tumorales en la cara anterior de las piernas, dolor óseo generalizado y alteraciones endocrinológicas. Se planteó el diagnóstico de histiocitosis mixta. Se sugirió tratamiento con: anticuerpos monoclonales anti BRAF V600E, interferón alfa y/o quimioterapia. Conclusión: Es posible realizar el diagnóstico de histiocitosis a partir de los antecedentes personales patológicos del paciente y los hallazgos clínicos manifiestos con el apoyo de estudios radiológicos, histológicos e inmunohistoquímicos. Finalmente, este es el primer caso de histiocitosis mixta publicado en Ecuador.
Introduction: Histiocytoses are rare diseases characterized by tissue infiltration by abnormal histiocytes. They are divided into five groups. They are frequent in the pediatric population. The combination of Langerhans cell histiocytosis and non-Langerhans cell histiocytosis is fortuitous. Case report: We report the case of a 66-year-old female patient who debuted with a history of systemic involvement, in which the presence of tumor masses on the anterior aspect of the legs, generalized bone pain and endocrinological alterations attracted our attention. The diagnosis of mixed histiocytosis was suggested. Treatment with anti BRAF V600E monoclonal antibodies, interferon alpha and/or chemotherapy was recommended. Conclusion: It is possible to make the diagnosis of histiocytosis based on the patient's personal pathological history and the clinical findings with the support of radiological, histological and immunohistochemical studies. Finally, this is the first case of mixed histiocytosis published in Ecuador.
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RESUMEN Introducción: La enfermedad de Rosai-Dorfman es una histiocitosis linfática masiva caracterizada por emperipolesis con inmunohistoquímica positiva para S100 y CD68. Es una entidad clínica rara y de curso benigno más comúnmente presentada en varones. Objetivo: El propósito de este caso clínico es demostrar el tratamiento exitoso de la enfermedad de Rosai-Dorfman con inmunomoduladores y quimioterapia metronómica. Presentación del caso: Paciente masculino de 57 años que acude por linfadenopatía cervical bilateral, a quien se le realiza tomografía y biopsia ganglionar con resultados positivos para S100 y CD68 con marcado fenómeno de emperipolesis. Recibió esquema inmunomodulador y quimioterapia metronómica exitosa con remisión de enfermedad. Conclusiones: Los pacientes diagnosticados con Rosai-Dorfman son muy pocos debido a lo inusual de esta entidad clínica. Es importante mencionar que esta enfermedad es una histiocitosis de células tipo No Langerhans con características de benignidad y buena respuesta al manejo con corticoides y quimioterapia metronómica, terapia instaurada en nuestro paciente con buena evolución.
ABSTRACT Introduction: Rosai-Dorfman disease is a massive lymphocytic histiocytosis characterized by emperipolesis with positive immunohistochemistry for S100 and CD68. It is a rare clinical entity of benign course most commonly presenting in males. Objective: The purpose of this clinical case is to demonstrate successful treatment of Rosai-Dorfman disease with immunomodulators and metronomic chemotherapy. Case presentation: A 57-year-old male patient presenting with bilateral cervical lymphadenopathy underwent CT scan and lymph node biopsy with positive results for S100 and CD68 with marked emperipolesis phenomenon. He received immunomodulatory scheme and successful metronomic chemotherapy with disease remission. Conclusions: Patients diagnosed with Rosai-Dorfman are very few due to the unusual nature of this clinical entity. It is important to mention that this disease is a non-Langerhans cell histiocytosis with benign characteristics and good response to management with corticosteroids and metronomic chemotherapy, therapy established in our patient with good evolution.
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Humanos , Masculino , Persona de Mediana EdadRESUMEN
Langerhans cell sarcoma (LCS) is a rare malignant tumor of Langerhans cells and uncommonly involves head and neck regions. Unlike Langerhans cell histiocytosis (LCH), it has an aggressive clinical course with malignant cytological features. Till now, a handful of cases have been reported and the common anatomical sites involved are skin, lymph node, and bone in loco – regional cases and lymph node, lung, liver, spleen, and bone in disseminated disease. Due to its rarity, standard protocols of treatment for these patients are not yet well established. Herein, we report such a case in a 25-year-old male presenting with a bilateral submandibular swelling, which was diagnosed as LCH on Fine Needle Aspiration Cytology (FNAC) and later confirmed to be a case of LCS in histopathological examination and immunohistochemistry. The authors are aware of only a single similar case being reported in the English literature.