A case report of solitary fibrous tumor of the pleura: ultrasound diagnostic features.

Solitary fibrous tumor of the pleura is a rarely encountered clinical entity. Although the majority of these neoplasms have a benign course, the malignant form has also been reported. We describe the case of a 57-year-old male smoker with diabetes who was incidentally diagnosed on chest X-ray with a large solitary mass of the left hemithorax.

Structural heterogeneity and immunohistochemical profile of Hassall corpuscles in normal human thymus.

The study was conducted on 27 specimens of normal thymus, removed during surgery for cardiovascular malformations. Biopsies were processed using current histological techniques, and the samples were stained using morphological and immunohistochemical methods (cytokeratin profile, vimentin, S100, CD45, CD20, CD3, CD68, CD34 protein, chromogranin A, neuronal-specific enolase, desmin). Microscopic examination focused on the structure and immunohistochemical profile of Hassall corpuscles, beginning from the hypothesis that the epithelial cells of these structures, characteristic for the thymus, participate in the negative and positive selection of thymocytes.