Summary Stage 2018:Ill-Defined Other

Summary Stage 2018

Notes

**Ill-Defined Other** C420-C424, C761-C765, C767-C768, C770-C775, C778-C779: 8000-8700, 8720-8790, 9700-9701 C809: 8000-8040, 8042-8180, 8191-8246, 8248-8700, 8720-8790, 9700-9701 C760 and Schema Discriminator 1: Occult Head and Neck Lymph Nodes: 0, 1 (8000-8700, 8720-8790, 9700-9701) C760-C765, C767-C768, C809 C42 and C77, Other than Hematopoietic neoplasms (9590-9992) C420 Blood C421 Bone marrow C422 Spleen C423 Reticuloendothelial system, NOS C424 Hematopoietic system, NOS **Other and ill-defined sites of** C760 Head, face or neck, NOS C761 Thorax, NOS C762 Abdomen, NOS C763 Pelvis, NOS C764 Upper limb, NOS C765 Lower limb, NOS C767 Other ill-defined sites C768 Overlapping lesion of ill-defined sites **Lymph nodes of** C770 Lymph nodes of head, face and neck C771 Lymph nodes of intrathoracic C772 Lymph nodes of intra-abdominal C773 Lymph nodes of axilla or arm C774 Lymph nodes of inguinal region or leg C775 Lymph nodes of pelvis C778 Lymph nodes of multiple regions C779 Lymph nodes, NOS C809 Unknown primary site **Note 1:** The following sources were used in the development of this chapter * 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/ssm2000/) * Collaborative Stage Data Collection System, version 02.05: https://cancerstaging.org/cstage/Pages/default.aspx **Note 2:** *Schema Discriminator 1: Occult Head and Neck Lymph Nodes* is used to discriminate between Cervical Lymph Nodes and Unknown Primary Tumor of the Head and Neck, Ill-Defined Other and Soft Tissue Other when primary site is C760. **Note 3:** See the following schemas for the listed histologies * C760 (8000-8700, 8720-8790, 8941, 9700-9701: Schema Discriminator 1 Occult Head and Neck Lymph Nodes: 2, 3, 4, 5): *Cervical Lymph Nodes and Unknown Primary Tumors of the Head and Neck* * C760 (8941: Schema Discriminator 1 Occult Head and Neck Lymph Nodes: 0,1): *Soft Tissue* * C809 (8041, 8190, 8247): *Merkel Cell Skin* * 8710-8714, 8800-8934, 8940-9137, 9141-9582: *Soft Tissue* * 8935-8936: *GIST* * 9140: *Kaposi Sarcoma* **Note 4:** Summary Stage is the only applicable staging system for this site/histology/schema. **Note 5:** Codes 0, 1, 2, 3, 4, and 7 are not applicable for this chapter.

Default

9

NAACCR Item

NAACCR #764
SS2018 Description
9 Unknown if extension or metastasis; unstageable
(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)