D20 - Benign neoplasm of soft tissue of retroperitoneum and peritoneum
Excludes 1:
-benign lipomatous neoplasm of peritoneum and retroperitoneum D17.79)
-benign neoplasm of mesothelial tissue (D19.-)
D20.0 - Benign neoplasm of soft tissue of retroperitoneum
D20.1 - Benign neoplasm of soft tissue of peritoneum