We report the case of a postoperative foreign body granuloma, which was misdiagnosed as a metastatic lymph node, but confirmed by laparoscopic removal. A-68-year old man was admitted for the management of a suspected metastatic lymph node. He had undergone a laparoscopy-assisted distal gastrectomy, with simultaneous D2 lymph node dissection and a left adrenalectomy for T1N0M0 early gastric cancer and an adrenal adenoma 8 months previously. Preoperative computed tomography and whole body PET showed a 1.6 cm sized suspected metastatic lymph node between the efferent jejunal loop and pancreas tail. A diagnostic laparoscopy was performed for pathological confirmation. After laparoscopic adhesiolysis, the lesion was localized using laparoscopic ultrasonography, with the mass also removed laparoscopically. Permanent pathology revealed the mass to be a foreign body granuloma, but without malignancy. In cases of suspected local recurrence or lymph node metastasis following radical surgery, a diagnostic laparoscopic procedure could play a role in confirming the recurrence.