[Thyroid oncocytic adenoma. A review of the morphological spectrum in four cases].

Oncocytic change involves a cytoplasmic enlargement due to mitochondrial accumulation observed in a wide variety of conditions and in multiple organs. It can be reactive or neoplastic. In the thyroid gland, this change is a metaplastic phenomenon that takes place under different circumstances that promote cellular stress, and could even produce a true neoplasm, both benign or malignant.

[Pure mucinous (colloid) carcinoma of the male breast. An uncommon subtype].

Pure mucinous (colloid, mucous) carcinoma of the male breast is an extremely rare neoplasm. We report the case of a 74-year-old male who displayed a rapidly growing retroareolar tumor of the left breast. The patient underwent modified radical mastectomy.

[Küttner's tumour (chronic sclerosing sialadenitis). Clinical, pathological, and immunohistochemical study in 8 cases of a little-known entity].

Objective: To present the clinical-pathological characteristics of Küttner's tumour (KT) or chronic sclerosing sialadenitis.

Material And Method: We studied 8 cases of KT that were graduated histologically according to the Seifert grading system. An immunohistochemistry panel including CD20, CD3, and keratin AE1-3 was performed.

[Expression of p53 and BCI-2 as prognostic markers and for anatomical location in gastrointestinal stromal tumors (GIST). Clinico-pathological and immunohistochemistry study of 19 cases].

Objective: To correlate the expression of p53 and BCl-2 with the clinical outcome and anatomic location of the gastrointestinal stromal tumours (GIST).

Background Data: The GIST are the most common nonepithelial neoplasm of the gastrointestinal tract. In spite of the existence of a wide range of predictive factors, their clinical outcome is unpredictable.