title: Expression of p53, Ki-67 and Bcl-2 in parathyroid adenoma and residual normal tissue.
abstract: The aim of this study was to investigate the expression of Ki-67, bcl-2 and p53 in parathyroid adenomas and their residual rim of normal parathyroid tissue. Specimens from 26 parathyroid adenomas were studied by immunohistochemical analysis for Ki-67, bcl-2 and p53 expression. Positive findings were noted for p53 in 4 (15%) adenomas and none of the residual rims of normal parathyroid tissue (p = 0.055); for Ki-67 in 15 (56%) adenomas and none of the residual rims of normal parathyroid tissue (p = 0.00002); and for bcl-2 in 19 (73%) adenomas and 8 (31%) residual rims of normal parathyroid tissue (p < 0.01). The high rate of Ki-67 expression may indicate susceptibility of parathyroid adenomas to clonal proliferation. The weak immunoreactive expression of p53, combined with a relatively strong expression of bcl-2, may contribute to the characteristic slow progression of these tumors.
authors.affiliation: Department of Otolaryngology--Head and Neck Surgery, Rabin Medical Center, Petah Tikva and Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
authors.forename: Tuvia
authors.initials: T
authors.lastname: Hadar
authors.forename: Jacob
authors.initials: J
authors.lastname: Shvero
authors.forename: Eitan
authors.initials: E
authors.lastname: Yaniv
authors.forename: Eduard
authors.initials: E
authors.lastname: Ram
authors.forename: Itzhak
authors.initials: I
authors.lastname: Shvili
authors.forename: Rumelia
authors.initials: R
authors.lastname: Koren
mesh_terms: D000236:Adenoma / Q000378:metabolism* / Q000473:pathology; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D019394:Ki-67 Antigen / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D010280:Parathyroid Glands / Q000378:metabolism* / Q000473:pathology; D010282:Parathyroid Neoplasms / Q000378:metabolism* / Q000473:pathology; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000378:metabolism*; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism*
chemical_list: D019394:Ki-67 Antigen; D019253:Proto-Oncogene Proteins c-bcl-2; D016159:Tumor Suppressor Protein p53