[Primary hepatic lymphoma: an infrequent cause of focal hepatic lesion].

Primary hepatic lymphoma (PHL) is confined to the liver with no evidence of extrahepatic lymphomatosis. Histopathologically, the PHL belongs to the group of non-Hodgkin's lymphomas and the most common subtype is the diffise large B-cell lymphoma. We present a 72-year-old woman, with no relevant antecedents and the following symptoms: early satiety, abdominal discomfort and rapid weight loss.

Human papillomavirus DNA and oncogene alterations in colorectal tumors.

The aim of the present study is to determine the presence and molecular integrity of high-risk HPV types in colorectal adenocarcinomas and to assess whether viral DNA is related to common proto-oncogene alterations, such as k-ras mutations and c-myc gene amplification, in colorectal cancer. Seventy-five colorectal adenocarcinomas were screened for HPV infection using nested-PCR (MY09/11-GP5+/6+). HPV typing was performed by type-specific PCR for HPV 16 and HPV 18 DNA.

["Glassy - cell" like adenocarcinoma: a new variant of gastric tumor].

Most gastric malignancies correspond histologically to adenocarcinomas, either of the intestinal or diffuse type, other tumoral varieties being much less frequent. We report a case of a malignant epithelial tumor, whose histological and cytological characteristics correspond to an unusual, although well defined entity, which may appear in the cervix and less frequently in the endometrium, known as adenocarcinoma of the glassy - cell variety. We have not found any previous reports of this particular.

[Lymphoepithelioma-like gastric carcinoma: unusual variant in postgastrectomy stump].

Gastric lymphoepithelioma--like carcinoma, undifferentiated with lymphoid or medullary stroma, constitutes a 3.8% of gastric carcinomas. Microscopically it is similar to other lymphoepitheliomas, it has an expansive growth and better prognosis than other histologic types.