Oncocitoma suprarrenal / Adrenal oncocytoma

Introducción: El oncocitoma suprarrenal es un tumor infrecuente e incidental y sin manifestaciones clínicas propias. Objetivo: Presentar un caso de oncocitoma suprarrenal y sus particularidades diagnósticas y terapéuticas. Caso clínico: Paciente masculino de 34 años de edad con antecedentes de salud, que se presentó por dolor lumbo-abdominal derecho, sin irradiación ni otros síntomas acompañantes. El examen físico fue normal. El ultrasonido informó un tumor de unos 7 cm de diámetro, localizado hacia el polo superior del riñón derecho. El origen suprarrenal se definió con la tomografía abdominal contrastada. Los valores sanguíneos de hormonas de la corteza suprarrenal fueron normales. Se hizo la exéresis total del tumor, mediante laparotomía convencional. El riñón estaba normal. El examen histopatológico notificó oncocitoma suprarrenal y lo ratificó la inmunohistoquímica. El paciente evolucionó satisfactoriamente. Conclusiones: El oncocitoma suprarrenal es un tumor infrecuente y de hallazgo fortuito. La tomografía abdominal contrastada no tiene alta especificidad para diferenciarlo de otros tumores suprarrenales. El perfil inmunohistoquímico del tumor es concluyente en el diagnóstico definitivo(AU)

Introduction: Adrenal oncocytoma is a rare and incidental tumor without its own clinical manifestations. Objective: To present a case of adrenal oncocytoma and its diagnostic and therapeutic characteristics. Clinical case: 34-year-old male patient with a medical history, who presented with right lumbo-abdominal pain, without radiation or other accompanying symptoms. The physical exam was normal. The ultrasound reported a tumor of about 7 cm in diameter, located towards the upper pole of the right kidney. The adrenal origin was defined with contrast abdominal tomography. The blood levels of hormones of the adrenal cortex were normal. Total excision of the tumor was performed by conventional laparotomy. The kidney was normal. Histopathological examination reported adrenal oncocytoma and immunohistochemistry confirmed it. The patient evolved satisfactorily. Conclusions: Adrenal oncocytoma is a rare and fortuitous tumor. Contrast abdominal tomography does not have high specificity to differentiate it from other adrenal tumors. The immunohistochemical profile of the tumor is conclusive in the definitive diagnosis(AU)

Oncocitoma suprarrenal / Oncocytic adrenocortical carcinoma

El oncocitoma suprarrenal es un tumor extremadamente infrecuente, con apenas unos 150 casos descriptos. Paciente de sexo masculino, de 48 años, con adrenalectomía derecha por incidentaloma suprarrenal de 7 cm, no funcionante. El oncocitoma suprarrenal no puede distinguirse desde el punto de vista clínico-imagenológico de otros tumores adrenales más frecuentes, por lo que su confirmación es histológica. Rara vez son malignos, y el tratamiento aceptado es la suprarrenalectomía, idealmente por vía laparoscópica. En nuestro caso, la presencia de dos criterios histológicos menores lo clasifican como un tumor con potencial maligno.

Oncocytic adrenocortical carcinoma is an extremely rare tumor, with only 150 cases reported in the literature. A 48-year-old male patient, with right adrenalectomy due to a 7-cm non-functional adrenal incidentaloma. From a clinical imaging point of view, oncocytic adrenocortical carcinoma cannot be distinguished from other more common adrenal tumors; therefore, the diagnostic confirmation is histological. It is rarely malignant, and the accepted treatment is laparoscopic adrenalectomy. In our case, two minor histological criteria classify it as a potentially malignant tumor.

Renal oncocytoma in a kidney transplant patient: the imaging features on contrast-enhanced ultrasonography (CEUS): a case report / Oncocitoma renal em paciente transplantado: achados de imagem na ultrassonografia com contraste

Abstract Renal oncocytoma is an infrequently reported renal neoplasm, often asymptomatic, which usually behaves as a benign entity and is identified accidentally on radiological imaging. Transplant patients under long-term immunosuppressive drugs have a high prevalence of cancers, such as skin cancers, lymphoproliferative disorders, and renal carcinomas. We present a case report of an asymptomatic renal oncocytoma in a kidney transplant recipient presenting persistent hematuria. The features of computed tomography and contrast-enhanced ultrasound (CEUS) are presented. This was the first time we used CEUS in a transplant kidney recipient presenting a renal mass, allowing the real-time visualization of contrast-enhancement patterns during all vascular phases for the differential diagnosis of renal tumors. Although the pattern of intense vascularization could mislead to an early judgment as a malignant lesion, it could help to exclude other renal lesions without inducing nephrotoxicity.

Resumo O oncocitoma renal é uma neoplasia renal raramente relatada, muitas vezes assintomática, que geralmente se comporta como uma entidade benigna e é identificada acidentalmente em imagens radiológicas. Pacientes transplantados em regimes imunossupressores de longa duração apresentam alta prevalência de neoplasias tais como câncer de pele, distúrbios linfoproliferativos e carcinomas renais. Apresentamos o relato de um caso de oncocitoma renal assintomático em receptor de transplante renal com hematúria persistente. São apresentados os achados de imagens de tomografia computadorizada e ultrassonografia (US) com contraste. Foi a primeira vez que utilizamos a US com contraste em um receptor de transplante renal que apresentava massa renal, permitindo a visualização em tempo real dos padrões de realce do contraste em todas as fases vasculares para o diagnóstico diferencial dos tumores renais. Embora o padrão de vascularização intensa possa induzir uma avaliação precoce de lesão maligna, o exame ajuda a excluir outras lesões renais sem induzir nefrotoxicidade.

Oncocytoma of the lacrimal gland: a case report / Oncocitoma de glândula lacrimal: relato de caso

ABSTRACT Here we describe a rare case of a benign tumor in the lacrimal gland of a healthy 4-year-old girl. Mild proptosis was the only abnormality observed on clinical examination. Magnetic resonance imaging of the right orbit revealed an oval, solid, well-circumscribed, homogeneous mass extending from the lacrimal gland and measuring 2.5 × 2.3 × 1.7 cm without any evidence of invasion into adjacent bones. The lesion was surgically excised and histological analyses defined the diagnosis of oncocytoma of the lacrimal gland. Although rare, oncocytoma should be included in the differential diagnosis of lacrimal gland tumors.

Resumo Nós descrevemos um raro caso de tumor benigno na glândula lacrimal em uma criança sadia de 4 anos de idade. Clinicamente, a paciente apresentava apenas uma discreta proptose. A ressonância nuclear magnética (RNM) de órbita direita revelou a presença de uma massa oval, sólida, bem-circunscrita, homogênea, se extendendo a partir da glândula lacrimal, medindo 2,5 cm x 2,3 cm x 1,7 cm, sem nenhum sinal evidente de invasão a estrutura óssea adjacente. A lesão foi cirurgicamente removida e analizada histopatologicamente, sendo estabelecido o diagnóstico de oncocitoma de glândula lacrimal. Apesar de raro, o oncocitoma deve ser incluído no diagnóstico diferencial de qualquer tumor originado da glândula lacrimal.

Oncocitoma: caso clínico / Oncocytoma: a clinical case

El oncocitoma es un tumor benigno que afecta varios órganos como tiroides, paratiroides, riñón y glándulas salivales, que consiste en la proliferación de células oncocíticas producidas por una gran hiperplasia mitocondrial. El oncocitoma representa menos del 1 por ciento de todos lostumores de las gandulas salivales. Cuando en estudios por imágenes de glándula parótida se observen múltiples pequeños nódulos con unamasa sólida o quística, el diagnóstico de oncocitoma debe ser considerado, especialmente en pacientes de sesenta o más años. El objetivo de este artículo es la presentación de un caso de oncocitoma y analizar el estado de arte de los casos reportados en la temática.

The oncocytoma is a benign neoplastic tumor that occurs in several organs, including the thyroid gland, parathyroid gland, kidneys, and salivary glands consisting of a proliferation of oncocytic cells produced by a large mitochondrial hyperplasia. The oncocytoma accounts for less than 1% of the whole salivary gland tumors.When multiple small nodules are found in the parotid gland with a large solid or cystic mass that is evident on imaging, a diagnosis of oncocytoma should be considered, particularly in patients of sixty years of age or older. The objective of this article is the presentation of a case of oncocytoma and the state of art of reported cases in this field.