... 1996,33:817-872.8. Hirota S, Isozaki K, Moriyama Y, Hashimoto K, Nishida T, Ishiguro S,Kawano K, Hanada M, Kurata A, Takeda M, Muhammad Tunio G,Matsuzawa Y, Kanakura Y, Shinomura Y, Kitamura Y: Gain-of-functionmuatations ... symptom was abdominal pain. Bleeding in the digestive tract and abdominal painwere more frequent in gastric GISTs (58% and 61%); acute abdominal symptoms were more frequent in jejunal and ileal GISTs ... Histolo-gical processing was obtained with formalin fixation fol-lowed by paraffin inclusion, 3 μm sectioning, and staining with he matoxylin and eosin. Morphologicappearance and cellular descriptions...