[Pleuropulmonary tumors. Presentation of 2 cases with peculiar clinicopathologic traits]. / Tumores pleuropulmonares. Aportación de dos casos con rasgos clinicopatológicos peculiares.

A pseudomesotheliomatous adenocarcinoma, which is a rare form of peripheral pulmonary tumor with diffuse thickening of the pleural cavity mimicking a mesothelioma, and a malignant mesothelioma with a carcinoma like disseminating pattern are presented. The biopsy obtained by thoracotomy in one case, and the necropsy studies enabled the diagnosis by the microscopic pattern, the presence of mucosubstances (PAS diastase) and the immune histochemical profiles with antibodies against several antigenic groups (CEA, EMA, CAM 5.2, and Vimentin. The value of these techniques to differentiate adenocarcinomas and mesotheliomas is discussed. The presence of CEA orients to an epithelial origin of a neoplasia.

[Pulmonary lymphangiomyomatosis. A case in a male]. / Linfangiomiomatosis pulmonar. Caso en un varón.

Pulmonary lymphangiomyomatosis occurs almost exclusively in women of reproductive age. We present the case of this entity in a 13 year-old male.

[Primary hyperparathyroidism in childhood: apropos of a new case]. / Hiperparatiroidismo primario en la infancia: a propósito de una nueva observación.

A case of primary hyperparathyroidism in a twelve-year-old boy is reported. Primary hyperparathyroidism should be considered in patients with hypercalcemia and hypophosphataemia. Involvement of others organs must be discarded with appropriate complementary test and then, an exploratory surgery must be undertaken by an experienced surgeon to proceed, if it is needed, to parathyroidectomy.