Middle ear neoplasms showing adenomatous and neuroendocrine components.

Middle ear adenomas are rare epithelial tumours. Reports indicate that neuroendocrine (carcinoid) tumours may also occur at this site, often in association with an adenomatous component. The clinico-pathological findings (including C.T. scan appearances) of such a 'mixed' neoplasm are presented together with a brief review of the few previously described cases. The importance of immuno-histochemistry and electron microscopy for accurate pathological diagnosis of these neoplasms is confirmed.