[Pelvic fibromatosis, as a cause of abdominal mass]. / Fibromatosis pélvica, como causa de masa abdominal.

Pelvic fibromatosis was found in a 26-year-old patient who was operated on for a possible uterine myoma. The histopathological diagnosis revealed an idiopathic retroperitoneal fibrosis. A second operation was performed in order to complete the exercise of the mass. Immunohistochemical techniques backed the initial diagnosis of pelvic fibromatosis.

[Schistosomiasis (bilharziosis). Importance of cytology. Report of 2 cases]. / Esquistosomiasis (Bilharziosis). Importancia de la citología. A propósito de dos casos.

We report two cases of bilharziasis of the bladder in immigrants who presented with spontaneous hematuria. This condition was diagnosed by urine cytology. The current tide of immigration and tourism have led to an increased number of diseases acquired abroad. A simple, economic and rapid method for diagnosing schistosomiasis in patients at risk with hematuria is described.

Melanotic adenocarcinoma of the anorectum.

A variety of tumors, besides those formed by melanocytes, may contain melanin pigment. Most of them have originated from the neural crest. Epithelial tumors with melanosomes are very unusual. We report the case of a 76-year-old woman with rectal adenocarcinoma that invaded the intestine and vagina extensively. At the anorectal site, melanin pigment was found in the cytoplasm of the malignant neoplastic epithelial cells, and melanosomes were ultrastructurally confirmed at various developmental stages. Melanocytes with cytoplasmic processes spreading between neoplastic cells were also present as the apparent source of the pigment contained in the neoplastic cells.