Central papillary adenoma of the lung diagnosed in a bronchoscopy-guided FNA: Cytological and histological characterization of this rare entity.

Pulmonary papillary adenoma (PA) is an unusual tumor with only 32 reported cases to date. We present a case of a 69-year-old man, a smoker from the age of 12, with a central mass in the pulmonary left lower lobe identified in a PET-CT scan. Microscopical analysis of the Fine Needle Aspiration (FNA) samples showed fragments of a tumor comprised of abundant papillary structures lined by a monolayer of cytologically bland columnar to cuboidal epithelial cells. The immunohistochemical stains were positive for CK7, TTF-1 and EMA in the epithelial cells, and negative for MYC. Based on the imaging tests, histological features and immunohistochemical profile, the tumor was diagnosed as pulmonary PA. The cytologic and histologic features of this rare entity are described in detail and the value of FNA as an essential presurgical diagnostic procedure is emphasized.

Ocronosis endógena: descripción de un caso / Endogenous ochronosis: a case description

La ocronosis endógena o alcaptonuria es una enfermedad autosómica recesiva producida por una insuficiencia de la enzima homogentísica oxidasa. Los individuos afectados excretan altas concentraciones de ácido homogentísico en orina que se oscurece cuando esta es alcalinizada u oxidada. También tiene lugar el depósito de pigmento marrón negruzco en el tejido conjuntivo, que provoca habitualmente, a partir de la cuarta década, las típicas manifestaciones externas de esta enfermedad junto con alteraciones en otros órganos. Presentamos un caso clínico de ocronosis endógena, proceso muy poco frecuente en nuestro medio y detallaremos los aspectos más destacados del caso

Endogenous ochronosis or alkaptonuria is an autosomal recessive disease caused by a deficiency of the enzyme homogentisic acid oxidase. Affected individuals excrete high levels of homogentisic acid in the urine, which darkens when it is alkalinized or oxidized. Deposits of blackish-brown pigment also occur in connective tissue; this causes, usually starting around the age of 40, the typical external manifestations of this disease, along with disorders in other organs. We present a clinical case of endogenous ochronosis, a very infrequent disease in our milieu. We will discuss the most noteworthy features of the case

[Endogenous ochronosis: a case description]. / Ocronosis endógena: descripción de un caso.

Endogenous ochronosis or alkaptonuria is an autosomal recessive disease caused by a deficiency of the enzyme homogentisic acid oxidase. Affected individuals excrete high levels of homogentisic acid in the urine, which darkens when it is alkalinized or oxidized. Deposits of blackish-brown pigment also occur in connective tissue; this causes, usually starting around the age of 40, the typical external manifestations of this disease, along with disorders in other organs. We present a clinical case of endogenous ochronosis, a very infrequent disease in our milieu. We will discuss the most noteworthy features of the case.

Hidradenitis palmar idiopática / Idiopathic palmar hidradenitis

Se presenta el caso de una niña de 7 años con hidradenitis palmar idiopática. La presencia de nódulos eritematoedematosos, dolorosos, localizados exclusivamente en las palmas de las manos con unos hallazgos histológicos de hidradenitis ecrina puede plantear diversos diagnósticos diferenciales y la realización de estudios complementarios innecesarios (AU)

Renal cell carcinoma detected on Tc-99m-labeled red blood cell imaging.

A 61-year-old-man with persistent anemia was referred for a Tc-99m-labeled red blood cell (RBC) scan to detect any source of gastrointestinal bleeding. RBC scintigraphy revealed a hypervascular mass in the left renal fossa with functional loss in that kidney, suggesting the possibility of a renal cell carcinoma (RCC). Computed tomography confirmed this. Most RCC tumors are hypervascular on conventional angiography, with a maximum incidence in men in the sixth decade. The incidental diagnosis of RCC during radionuclide imaging has been documented in previous reports, but the authors are not aware of any case of RCC diagnosed during a RBC scan. This case illustrates the importance of careful attention to the appearance of the kidneys on radionuclide scans. Noticeable asymmetric renal activity in a patient without known renal parenchymal disease warrants further investigation.