Immunohistochemistry in the differential diagnosis of tumours of possible myogenic origin.

A series of 34 cases of soft tissue tumours of possible muscle origin was studied immunohistochemically using different antibodies. Tissue specimens and/or aspirates from fine needle aspiration biopsy (FNAB) were examined. The results indicate that immunohistochemistry is a valuable tool in differential diagnosis of soft tissue tumours, improving diagnostic accuracy in 83.

Neuroendocrine (Merkel cell) carcinoma of the skin: a clinico-morphological study of 13 cases.

The clinico-morphological features in 13 patients (nine female) with neuroendocrine carcinoma of the skin are presented. The mean age was 64.9 years.

Neuroendocrine (Merkel-cell) carcinoma of the skin. Cytology, intermediate filament typing and ultrastructure of tumor cells in fine needle aspirates.

The light and transmission electron microscopic findings and the intermediate filament typing of tumor cells from fine needle aspirates of primary, recurrent and metastatic neuroendocrine (Merkel-cell) carcinoma of the skin are described. The tumor cells in the smears coexpressed keratins and neurofilaments and were characterized by "intermediate filament buttons," i.e.