Primary extragastrointestinal stromal tumor arising in the vaginal wall: significant clinicopathological characteristics of a rare aggressive soft tissue neoplasm  

作　　者：Qiu-yu Liu yun-zhen Kan Meng-yang zhang Ting-yi Sun Ling-fei Kong 

机构地区：[1]Department of Pathology, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University

出　　处：《World Journal of Clinical Cases》2016年第4期118-123,共6页世界临床病例杂志

摘　　要：Gastrointestinal(GI)stromal tumor is the most common mesenchymal neoplasm of the GI tract but also occurs with a lower frequency in extragastrointestinal regions and is called extragastrointestinal stromal tumor(EGIST).We report an unusual case of EGIST presenting as a vaginal mass.A 41-year-old woman presented with a gradually enlarging vaginal mass for the last2 years.Physical examination revealed an elliptical,non-tender mass about 7.5 cm×7 cm in size in the posterior vaginal wall and was resected completely.Under histological examination,the tumor showed a spindle cell type with coagulation necrosis,hemorrhage and high mitotic count.Immunohistochemical analysis revealed tumor cells were positive for DOG1,CD117,CD34 and p53 protein.Ki-67 labeling was 8%.Genetic analysis showed a deletion of exon 11 of the c-kit gene at codons 557-558.EGISTs should be kept in mind in the differential diagnosis in patients presenting with solid mass of the vaginal wall.Gastrointestinal(GI) stromal tumor is the most common mesenchymal neoplasm of the GI tract but also occurs with a lower frequency in extragastrointestinal regions and is called extragastrointestinal stromal tumor(EGIST). We report an unusual case of EGIST presenting as a vaginal mass. A 41-year-old woman presented with a gradually enlarging vaginal mass for the last 2 years. Physical examination revealed an elliptical, non-tender mass about 7.5 cm × 7 cm in size in the posterior vaginal wall and was resected completely. Under histological examination, the tumor showed a spindle cell type with coagulation necrosis, hemorrhage and high mitotic count. Immunohistochemical analysis revealed tumor cells were positive for DOG1, CD117, CD34 and p53 protein. Ki-67 labeling was 8%. Genetic analysis showed a deletion of exon 11 of the c-kit gene at codons 557-558. EGISTs should be kept in mind in the differential diagnosis in patients presenting with solid mass of the vaginal wall.

关 键 词：PLATELET derived growth factor receptor alpha Extragastrointestinal STROMAL TUMORS VAGINA C-KIT Mutation 

分 类 号：R735[医药卫生—肿瘤]