{Reference Type}: Case Reports {Title}: Gastrointestinal stromal tumour: presenting as an ovarian cystadenoma. {Author}: Jawalkar S;Karajagi R;Arakeri SU; {Journal}: BMJ Case Rep {Volume}: 16 {Issue}: 11 {Year}: 2023 Nov 30 暂无{DOI}: 10.1136/bcr-2023-256244 {Abstract}: A gastrointestinal stromal tumortumour (GIST) is an uncommon gastrointestinal neoplasm that can arise from any part of the gastrointestinal tract. They can rarely present as a pelvic mass, which might result in a gynaecological condition being misdiagnosed in a female patient. A woman in her early 70s presented with a huge pelvic mass. Abdomen-pelvis CT scan showed a significant cystic mass in the left-sided pelvis with a mass effect on adjacent structures, which suggested a possibility of an ovarian cystadenoma. Her CA-125 was normal. She underwent an exploratory laparotomy with pelvic mass excision. A diagnosis of a gastrointestinal stromal tumour (GIST) arising from the ileum was made on a histopathology study.