Figure 2 Gastrointestinal stromal tumour (GIST). (A) Tumour mass with surrounding fibrous capsule is seen in the gastric wall, leaving the mucosa uninvolved. (B, C) The lesion shows at least partially nested paraganglioma‐like appearance. Only very few mitoses are found (inset). Haematoxylin and eosin. (D) GIST. Tumour cells showing diffuse cytoplasmic positivity with the antibody against CD117. Anti‐CD117 (1595), avidin–biotin–peroxidase complex method.