Summary Stage 2018: Retroperitoneum

Summary Stage 2018

Notes

**Soft Tissue Sarcoma-Retroperitoneum** C480-C482, C488 C480 Retroperitoneum C481 Specified parts of peritoneum (including omentum and mesentery) C482 Peritoneum, NOS C488 Overlapping lesion of retroperitoneum and peritoneum **Note 1:** The following sources were used in the development of this schema * SEER Extent of Disease 1988: Codes and Coding Instructions (3rd Edition, 1998) (https://seer.cancer.gov/archive/manuals/EOD10Dig.3rd.pdf) * SEER Summary Staging Manual-2000: Codes and Coding Instructions (https://seer.cancer.gov/tools/ssm/) * Collaborative Stage Data Collection System, version 02.05: https://cancerstaging.org/cstage/Pages/default.aspx * Chapter 44 *Soft Tissue Sarcoma of the Retroperitoneum*, in the AJCC Cancer Staging Manual, Eighth Edition (2017) published by Springer International Publishing. Used with permission of the American College of Surgeons, Chicago, Illinois. **Note 2:** Code 0 is not applicable for this schema

NAACCR Item

NAACCR #764
SS2018 Description
1 Localized only (localized, NOS) - Confined to site of origin
2 Regional by direct extension only - Adjacent connective tissue, NOS - Adjacent organs/structures, NOS - Bone/cartilage - Retroperitoneum (C480) + Adrenal(s) (suprarenal gland(s)) + Aorta + Colon (ascending and descending) + Kidney(s) + Pancreas + Vena cava + Vertebra - Peritoneum (C481, C482, C488) + Colon (except ascending and descending colon) + Esophagus + Gallbladder + Liver + Small intestine + Spleen + Stomach
3 Regional lymph node(s) involved only - Intra-abdominal - Paracaval - Pelvic - Subdiaphragmatic - Regional lymph node(s), NOS + Lymph node(s), NOS
4 Regional by BOTH direct extension AND regional lymph node(s) involved - Codes (2) + (3)
7 Distant site(s)/lymph node(s) involved - Distant site(s) (including further contiguous extension) + Peritoneum (C481, C482, C488) * Colon (ascending and descending colon) - Distant lymph node(s), NOS - Distant metastasis, NOS + Carcinomatosis + Distant mets WITH or WITHOUT distant lymph node(s)
9 Unknown if extension or metastasis
(1) Fritz AG, Ries LAG (eds). **SEER Extent of Disease 1988: Codes and Coding Instructions (3rd Edition, 1998)**, National Cancer Institute, NIH Pub. No. 98-2313, Bethesda, MD, 1998 (2) Young JL Jr, Roffers SD, Ries LAG, Fritz AG, Hurlbut AA (eds.). **SEER Summary Staging Manual-2000: Codes and Coding Instructions**, National Cancer Institute, NIH Pub. No. 01-4969, Bethesda, MD, 2001. (3) Collaborative Stage Work Group of the American Joint Committee on Cancer. **Collaborative Stage Data Collection System User Documentation and Coding Instructions, version 02.05**. American Joint Committee on Cancer (Chicago, IL) (4) Gress, D.M., Edge, S.B., Gershenwald, J.E., et al. **Principles of Cancer Staging**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017: 3-30 (5) Pollock, R.E., Maki, R.G. **Introduction to Soft Tissue Sarcoma**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017: 489-497 (6) Pollock, R.E., Maki, R.G., et al. **Soft Tissue Sarcoma of the Retroperitoneum**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017: 531-537