Sporadic somatic mutation of c-kit gene in a family with gastrointestinal stromal tumors without cutaneous hyperpigmentation.
We described two members in a family with gastrointestinal stromal tumors (GISTs) without cutaneous hyperpigmentation. The patients were father and son who did not have cutaneous hyperpigmentation. Histological examination showed that these tumors were GISTs expressing CD34 and CD117. Tumor DNA extracted from paraffin-embedded specimens revealed somatic mutation with a deletion mutation at different codons in exon 11 of c-kit gene after direct sequencing analysis. No germline mutation was detected in DNA extracted from peripheral leukocytes obtained from the father and son. We propose that GISTs could be caused by sporadic somatic mutation in a family without germline mutation and hyperpigmentation.
Department of Surgery, Chang Gung Memorial Hospital, 5 Fu-Hsing Street, Kwei-Shan, Taoyuan, Taiwan, China. ycn@adm.cgmh.org.tw
Chun-Nan
CN
Yeh
Tsung-Wen
TW
Chen
Yi-Yin
YY
Jan
D000368:Aged; D018952:Antigens, CD34 / Q000378:metabolism; D001483:Base Sequence; D004273:DNA, Neoplasm / Q000032:analysis; D046152:Gastrointestinal Stromal Tumors / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D009154:Mutation / Q000235:genetics*; D010375:Pedigree; D019009:Proto-Oncogene Proteins c-kit / Q000235:genetics* / Q000378:metabolism
D018952:Antigens, CD34; D004273:DNA, Neoplasm; D019009:Proto-Oncogene Proteins c-kit