Malacoplakia and Rosai-Dorfman disease: two entities of histiocytic origin infrequently localized in the female breast--the cytologic aspect in aspirates obtained via fine-needle aspiration cytology.

We describe one case of Rosai-Dorfman disease (RDD) localized in the breast and one case of breast malacoplakia (MPK) both diagnosed by fine-needle aspiration cytology (FNAC). In RDD the cytologic features were lymphocytophagocytosis, large histiocytes with slight nuclear atypia, and lymphohistiocytic aggregates in a polymorphous background which included frequent plasma cells. In MPK the key diagnostic feature was the presence of Michaelis-Gutmann bodies (M-G bodies), in various stages of evolution, intermingled with vacuolized medium-sized histiocytes, other inflammatory cells, and debris. Pap staining is the technique of choice to show lymphocytophagocytosis and M-G bodies and there is no need to resort to special staining methods. RDD and MPK share a common cytologic background: the presence of numerous benign reactive histiocytes, either engulfing apparently intact lymphocytes, or phagocytizing M-G bodies. The cytologic findings seen in both cases suggest that the presence of histiocytes in a breast aspirate is far from being nonspecific and can represent an important lead to disparate diseases such as RDD and MPK.

Diagnosis of collagenous spherulosis of the breast by fine needle aspiration cytology. A report of two cases.

We describe the cytopathologic features of two cases of collagenous spherulosis of the breast on fine needle aspiration cytology. The main findings were a moderately rich cellular aspirate, monolayered epithelial clusters with bland nuclei, naked bipolar nuclei and light green (Papanicolaou stain) or pink (Diff-Quik) spherules surrounded by a ring of comma-shaped nuclei resembling myoepithelial cells, located either at the heart of the epithelial clusters or detached from them. We also comment on the differential diagnosis with adenoid cystic carcinoma of the breast, signet-ring carcinoma and myospherulosis.

[Barrett esophagus: epidemiologic data and risk of becoming malignant]. / Esófago de Barrett: datos epidemiológicos y riesgo de malignización.

A series is presented of 152 patients diagnosed over a 9-year period by endoscopy and biopsy as Barrett's esophagus. We analyzed epidemiological data and the risk of malignancy, and calculated the prevalence and incidence in our series.