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S‐phase fractions of colorectal carcinomas related to pathologic and clinical features
Author(s) -
Meyer John S.,
Prioleau Philip G.
Publication year - 1981
Publication title -
cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.052
H-Index - 304
eISSN - 1097-0142
pISSN - 0008-543X
DOI - 10.1002/1097-0142(19810901)48:5<1221::aid-cncr2820480528>3.0.co;2-b
Subject(s) - medicine , colorectal cancer , radiation therapy , pathology , metastasis , chemotherapy , lymph , rectum , oncology , gastroenterology , cancer
Abstract The S‐phase fractions (SPFs) of epithelial cells in 100 resected colorectal carcinomas were measured by in vitro exposure to tritiated thymidine and autoradiography. The frequency distribution of SPFs was gaussian with a median of 17.8 per hundred in 90 unirradiated carcinomas, whereas in ten carcinomas given radiation therapy preoperatively, it was positively skewed with a median of 6.9. Analysis of the unirradiated carcinomas showed no relationship between SPF and various clinical and morphologic features that included age, race, sex, site, size, Dukes' stage, histologic grade of the tumor, number of metastasis‐bearing regional lymph nodes, presence of adenomas of the large bowel, survival or relapse‐free survival of the patient, or SPF or adjacent normal colorectal crypts. The results show no evidence that colorectal carcinomas can be divided into kinetic subsets. The spatial orientation of labeled cells in autoradiographs indicated presence of a nonproliferative fraction of cells in many tumors that may modulate response to radiation therapy and chemotherapy.