Radiologic and histopathology features of follicular dendritic cell sarcoma in the stomach and abdominal cavity: a case report

It is highly uncommon for the gastrointestinal tract to be affected by follicular dendritic cell sarcoma(FDCS), a rare mesenchymal tumor that typically develops in the lymph nodes. Here, we describe a 64-year-old woman who discovered a lump in her left upper abdomen six months ago and was just taken to the hospital due to excruciating abdominal pain. An abdominal CT scan shows a soft tissue mass around the cardia. The patient underwent “radical total gastrectomy and esophagojejunostomy (Roux-Y anastomosis)”. Immunohistochemical and postoperative histopathology results were compatible with FDCS. The pathogenic characteristics of FDCS have received substantial discussion in the literature, however, the imaging characteristics of FDCS that involves the stomach and abdominal cavities have received less attention. This case report aims to enhance clinicians' understanding and diagnosis of dendritic cell sarcoma in the stomach and abdominal cavities of abdominal follicles and reduce the rate of clinical misdiagnosis.