title: Effect of progestogen (Depo-Provera) on annulate lamellae in endometrial carcinoma.
abstract: The authors studied electron microscopically the effect of a large dose of medroxyprogesterone acetate (Depo-Provera) on the fine structure of endometrial carcinoma, with special regard to the annulate lamellae of the cells. Following treatment in one-third of their cases of highly-differentiated endometrial carcinoma the glandular epithelial cells were found to show a marked regression. After using a large dose of progestogen, the oestrogen-dependent annulate lamellae 'disappeared' from the cytoplasm of the cells. This phenomenon may be one of the morphological manifestations of subcellular oestrogen-progesterone antagonism.
mesh_terms: D005260:Female; D006801:Humans; D008525:Medroxyprogesterone / Q000031:analogs & derivatives* / Q000627:therapeutic use; D017258:Medroxyprogesterone Acetate; D008854:Microscopy, Electron; D009376:Neoplasms, Hormone-Dependent / Q000188:drug therapy* / Q000648:ultrastructure; D009940:Organoids / Q000187:drug effects; D014594:Uterine Neoplasms / Q000188:drug therapy* / Q000648:ultrastructure
chemical_list: D017258:Medroxyprogesterone Acetate; D008525:Medroxyprogesterone