A case of primary retroperitoneal amyloidoma resected laparoscopically

Amyloidosis is known as a group of diseases that causes various disorders because of deposition of amyloid protein in various organs. Amyloidosis occurring in the retroperitoneum is a rare disease. We report a 75-year-old male patient presented to our hospital because he was identified with a retroperitoneal mass incidentally by CT. Laparoscopic surgery was performed to resect the tumor. In the histopathological specimen, amyloid was found in the fibrous soft tissue by Congo red staining. This is the first report to document a primary solitary amyloidosis of the retroperitoneum without systemic amyloidosis, which was resected using the laparoscopic approach.