title: Electron microscopic and ultracytochemical investigations of thyroid C cells in primary hyperparathyroidism.
abstract: The subject of study were C Cells of the human thyroid in course of primary hyperparathyroidism caused by the presence of a single adenoma. C cells were estimated by routine electron microscopic technique and by cytochemical cholinesterase (ChE) reaction according to Iwayama in electron microscopic technique. The presence of single C cells and of a small agglomeration of these cells, parafollicularily localized was found in the thyroid gland. An electron dense reaction product was noticed on membraneous structures of C cells of the thyroid.
mesh_terms: D000236:Adenoma / Q000473:pathology; D002802:Cholinesterases / Q000378:metabolism; D006651:Histocytochemistry; D006801:Humans; D006961:Hyperparathyroidism / Q000473:pathology*; D007425:Intracellular Membranes / Q000648:ultrastructure; D008854:Microscopy, Electron; D010282:Parathyroid Neoplasms / Q000473:pathology; D013961:Thyroid Gland / Q000201:enzymology / Q000648:ultrastructure*
chemical_list: D002802:Cholinesterases