The following pseudoneoplastic lesions are discussed: (1) reactive/reparative glandular atypia; (2) mitotically active endocervical glands; (3) tubal/tuboendometrioid metaplasia; (4) endometriosis; (5) mesonephric remnants; (6) intestinal metaplasia; (7) Arias-Stella reaction; and (8) atypical oxyphilic
granular cell adenoma of parotid; report of a case.
tall cells, clear cells, or oxyphilic
cells), all known variants display nuclear grooving and intranuclear pseudoinclusions that identify them as papillary carcinomas.
Additionally, 3 cell types were observed: oxyphilic
and clear cells, and the more common "normal" cells with slightly eosinophilic to amphophilic cytoplasm.
Histologically, the tumor exhibits the characteristic triad of papillary, epithelial projections of oxyphilic
(oncocytic, granular) cells into cystic spaces in association with a variable amount of lymphoid stroma (figure 1).
5) The adult parathyroid is composed predominantly of chief cells, as well as oxyphilic
cells, which are mitochondria rich, and transitional oxyphilic
cells, which appear to represent an intermediate phase from chief cell to oxyphilic
1) The terms oncocytic carcinoma, oncocytic adenocarcinoma, malignant oncocytoma, and malignant oxyphilic
adenoma are synonymous.
Therefore, we classify a neoplasm of the thyroid follicular epithelium on the basis of nuclear characteristics, and a particular case may be diagnosed as papillary carcinoma, even if it is entirely follicular and/or oxyphilic
Microscopically, the glands are nodular, and examination will identify an increase in parenchymal-cell mass, composed of chief cells and/or oxyphilic
When a biotin detection system was used, nonspecific staining was seen regularly in oxyphilic
cells in lymphocytic thyroiditis.
Renal epithelioid oxyphilic
neoplasms (REON): a pleomorphic monophasic variant of renal angiomyolipoma [abstract].
Other entities in the differential diagnosis for oxyphilic
endobronchial lesions include granular cell tumor, salivary gland-type tumors, paraganglioma, and metastases from thyroid or renal neoplasms.