Figure 1From: Survival of gastrointestinal stromal tumor patients in the imatinib era: life raft group observational registry Age at diagnosis by gender. Female gender is known to be associated with pediatric-type GIST. Using high female to male ratio as a surrogate marker for pediatric GIST, our data suggests that pediatric-type GIST occurs with decreasing frequency until about age 35 (at diagnosis). Also see Table 3.Back to article page