Nasopharyngeal adenocarcinomas: a clinicopathologic study of 44 cases including immunohistochemical features of 18 papillary phenotypes.

Nasopharyngeal adenocarcinomas (NPACs) are uncommon neoplasms with a diverse histomorphology and clinical behavior. The purpose of our study was to better understand the clinicopathologic characteristics of NPACs and to identify the histologic and immunohistochemical features that distinguish the subtypes of papillary NPACs. We conducted a retrospective review of 44 cases of NPACs accessioned between 1985 and 2000.

Adenolipomas of the head and neck: analysis of 6 cases.

Adenolipomas are rare benign neoplasms composed of mature adipose tissue and glandular elements. We report 6 patients with adenolipomas of the head and neck region: 3 in the parathyroid, 2 in the thyroid, and 1 in the parotid gland. The patients were 4 women and 2 men, ranging in age from 21 to 70 years (mean, 62.