[Mucinous adenocarcinoma of the urachus synchronic with colorectal adenocarcinoma. Value of immunohistochemistry in the differential diagnosis]. / Adenocarcinoma mucinoso de uraco sincrónico con adenocarcinoma colorrectal. Valor de la inmunohistoquímica en el diagnóstico diferencial.

The coincidence of an urachal adenocarcinoma with another similar tumour in other location makes necessary to separate a true primary from a metastatic adenocarcinoma. We report the case of a 66-years-old-man with an urachal mucinous adenocarcinoma and two colonic adenocarcinoma excised in the same surgical act, showing both macro and microscopic studies together with immunohistochemical techniques, that were useful to differentiate the origin of both neoplasms. Among them, the antibody to keratin 7, a cytoplasmic epithelial protein, was positive in the urachal and negative in the colonic tumour.

[Bladder metastases of pulmonary carcinoma. A report of 2 cases]. / Metástasis vesicales de carcinoma pulmonar. Presentación de dos casos.

Metastatic vesical tumours caused by blood- or lymph-borne neoplasias from any part of the body are extremely uncommon (less than 1% of vesical tumours), and even within this group lung tumours are the origin in a very small number of cases. Diagnosis usually happens in advanced stages due to the limited symptomatology exhibited. This paper refers two cases of vesical metastatic neoplasias from lung tumours, one an oat-cell anaplastic carcinoma and one epidermoid. Also, in the first one there was the peculiarity of haematuria being the early manifestation which lead to the diagnosis of lung neoplasia.

[Multiple nodular pulmonary AA amyloidosis. A case report]. / Amiloidosis nodular pulmonar múltiple de tipo AA. Presentación de un caso.

Amyloidosis is a uncommon disease which affect respiratory system with well defined patterns. We describe a case of multiple nodular pulmonary amyloidosis in a 81 year old man mimicking other entities: metastatic disease, tuberculosis and other granulomatose diseases. In our patient amyloide substance was type AA, being type AL the most frequent one in nodular pulmonary amyloidosis.

Hemorrhagic cyst mimicking renal malignancy in a child.

Hemorrhage is a very rare complication of renal cyst in childhood. We report a six year-old-male with spontaneous macroscopic hematuria in which ultrasound and CT studies demonstrated a solid renal mass. Pathological examination of the resected lesion revealed a hemorrhagic cyst.

An unusual appearance of a left adrenal mass on computed tomography.

A case of carcinoma of the left adrenal gland in which computed tomography (CT) demonstrated posterior displacement of the splenic vessels and tail of the pancreas is reported.

Amyloid goiter in a child--US, CT and MR evaluation.

There are few radiological descriptions of amyloid goiter, basically in adult patients of oriental origin. We present a ten-year-old boy with Still's disease and secondary thyroid amyloidosis, describing the US, CT and MR findings.

[Primary renal lymphoma in an HIV-positive patient]. / Linfoma renal primario en paciente V.I.H. positivo.

We report on an HIV positive patient with bilateral primary renal non-Hodgkin lymphoma that remitted with chemotherapy. The clinical and radiological features, which are initially not distinct from those of other tumors in the same site, and the therapeutic possibilities are discussed.

Riedel thyroiditis: US, CT, and MR evaluation.

We report the ultrasound, CT, and MR findings in a patient with Riedel thyroiditis. The hypointensity of the lesion observed on T1- and T2-weighted sequences, especially when associated with infiltration of adjacent structures of the neck, can be suggestive of Riedel thyroiditis.

Chronic pneumomediastinum and subcutaneous emphysema: association with dermatomyositis.

We describe a 41-year-old patient with adult-onset dermatomyositis who developed persistent pneumomediastinum and severe subcutaneous emphysema due to end-stage interstitial lung disease. The diagnosis of dermatomyositis was based on proximal muscle weakness, electromyographic findings of inflammatory myopathy, and positive findings on muscle biopsy. Low levels of creatine kinase elevation were found at the time of diagnosis (a form of dermatomyositis which has been associated with a poor prognosis). The patient had no signs of cutaneous vasculitis. Despite treatment with prednisone and azathioprine, she died of intercurrent gram-negative sepsis 15 months after the diagnosis of dermatomyositis.

Amiloidosis nodular pulmonar múltiple de tipo AA. Presentación de un caso / Multiple nodular pulmonary AA amyloidosis: a case report

La amiloidosis es una enfermedad poco frecuente, que puede afectar el aparato respiratorio con patrones bien delimitados. Presentamos un caso de amiloidosis nodular pulmonar múltiple en un paciente varón de 81 años, que planteó el diagnóstico diferencial con otras entidades: enfermedad metastásica, tuberculosis, y otras enfermedades granulomatosas. En nuestro paciente la sustancia amiloide era de tipo AA, mientras que en la mayoría de los casos de amiloidosis pulmonar nodular el amiloide es de tipo AL (AU)