AUTHOR=Chen Linguang , Gu Jiannan , Zhang Xuejun , Yu Aijun 

TITLE=Case report: Giant cystic ileal gastrointestinal stromal tumor with an atypical intratumoral abscess

JOURNAL=Frontiers in Surgery

VOLUME=Volume 9 - 2022

YEAR=2023

URL=https://www.frontiersin.org/journals/surgery/articles/10.3389/fsurg.2022.1056831

DOI=10.3389/fsurg.2022.1056831

ISSN=2296-875X

ABSTRACT=Gastrointestinal stromal tumors (GISTs) are typically solid, sometimes with small cystic areas, but
rarely manifest as predominantly cystic neoplasms. In addition, cystic intestinal GISTs with
intratumoral abscess formation are rare. Here, we present the case of a 49-year-old male patient with
a history of frequent and urgent urination for 2 weeks. Radiologic studies revealed a large cystic mass
in the lower abdomen. The patient underwent abdominal laparotomy, which revealed a large cystic
mass arising from the distal ileum invading the sigmoid mesocolon and apex vesicae. Partial
resection of the ileum along with the tumor and the adjacent bladder was performed. Macroscopic
examination revealed that the cystic mass contained a large amount of foul-smelling pus and a tumor-
bowel fistula. The final pathology revealed an abdominal stromal tumor. Postoperative recovery was
uneventful, and adjuvant imatinib mesylate 400 mg was administered daily. No tumor recurrence or
metastasis was observed during the 9-month follow-up period