Which of the following markers is specific for gastrointestinal stromal tumor (GIST):: (A) CD 117, (B) CD 34, (C) CD123, (D) S-100
Answer is A. Ans. (a) CD 117(Ref: Robbins 9th/pg 775; 8th/pg 789)Most useful diagnostic marker is c-kit (CD117) detectable in 95% of the patients.