[A carcinoid tumor in a mature thymic teratoma].

A description of a carcinoid in the mature thymic teratoma in a 43-year-old woman. Teratoma was represented by the skin with appendages, intestinal and respiratory epithelium, salivary gland, fat tissue, islands of cartilage and ependyma. A carcinoid of alveolo-trabecular type consisting of cells with argyrophilic and argentaffinic properties was found in the area of submucous glands of a respiratory tube. Serotonin and neurotensin were found by means of PAP method in carcinoid cells.