Relationship between expression of cyclin D1, Ki-67 and bcl-2 and biologic behavior in CD117-positive gastrointestinal stromal tumors.
- Author:
Mei SUN
1
;
Xing-yi ZHANG
;
Hong-jie ZOU
;
Ya-xin SUN
;
Dong-fu LI
Author Information
- Publication Type:Journal Article
- MeSH: Adolescent; Adult; Aged; Child; Cyclin D1; metabolism; Female; Follow-Up Studies; Gastrointestinal Stromal Tumors; metabolism; pathology; Humans; Ki-67 Antigen; metabolism; Male; Middle Aged; Prognosis; Proto-Oncogene Proteins c-bcl-2; metabolism; Proto-Oncogene Proteins c-kit; metabolism
- From: Chinese Journal of Pathology 2005;34(12):788-790
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo investigate the clinicopathologic features of gastrointestinal stromal tumors (GISTs) and to identify reliable prognostic parameters.
METHODSFifty-nine GISTs were studied by immunostaining of CD117, CD34, SMA, desmin, S-100, bcl-2, and Ki-67. Histopathologic evaluations included tumor size, necrosis, histological growth patterns, mitotic activities and tumor lymphocytic infiltrate. The patients were clinically followed for 2 to 9 years. Univariate, multivariate and correlative statistical evaluations were used to analyze the data.
RESULTSAmong the 59 patients, 40 were alive and 15 died of their tumors at follow-up, the remaining 4 patients died of other causes. Pathological parameters that correlated with prognosis included tumor sizes of more than 5 cm, tumor tissue necrosis, mitotic cell count equal or higher than 5 per 50 high power field, Ki-67 labeling index (LI) equal or higher than 5% and intense bcl-2 immunostaining. Multivariate analysis showed that the mitotic count and Ki-67 LI were independent prognostic indicators. There was a correlation between mitotic count and Ki-67 LI.
CONCLUSIONSMitotic count and Ki-67 LI are the best predictors for a poor outcome of GIST after surgical treatment. Ki-67 immunostaining may substitute mitotic count as a useful prognostic parameter.
