Case Report

Local Resection by Combined Laparoendoscopic Surgery for Duodenal Gastrointestinal Stromal Tumor

Figure 4

(a) Macroscopic view. Resected tumor was  mm in diameter without injury of pseudocapsule. (b) HE staining revealed that spindle cells were proliferating in the submucosal layer. Mitosis was seen less than three cells/50 HPF. (c) The majority of the tumor cell was positive for immunostaining of KIT.