A Case of Desmoid Tumor Suspected to be Seeding Recurrence of Early Gastric Cancer

Abstract

It is often difficult to diagnose desmoid tumor because of the lack of specific imaging studies. A 45-year-old man underwent laparoscopy-assisted distal gastrectomy for gastric cancer M0II c, cT1N0M0, cStage IA. The postoperative diagnosis was gastric cancer M, Ant, adenocarcinoma, por and sig>tub2, pT1b1, ly2, v0, N2(3/29), M0, R0-pStage II A, so he was given S-1 8 cycle as postoperative adjuvant chemotherapy. There was a mass measuring 15 mm near the blind end of the Roux-Y jejunum as observed on the CT scan 3.5 years after the operation. However, on the CT scan 2.5 years after the operation, the same mass was 5 mm. As the mass grew slowly, we concluded that the mass was not dissemination recurrence, and we carried out surgery to remove the mass as well as staging laparoscopy. The mass was covered by the greater omentum, and there was no infiltration to the nearby structures. The patient was diagnosed with intra-abdominal desmoid tumor by pathological examination, and there were no cancer cells. He was alive and free of relapse 20 months after surgery.