Other and Ill-Defined Sites, Unknown Primary Site

Primary Site Histology Staging Type
C420-C424, C760-C765, C767-C768, C770-C775, C778-C779, C809 8000-9136, 9141-9582, 9700-9701 Summary Stage only

If you are working with a site/histology that only summary stages and you need to directly code it, please use the SEER Summary Stage 2000 manual

Notes

M-8000-9136,9141-9582,9700-9701 C42.0 Blood C42.1 Bone marrow C42.2 Spleen C42.3 Reticuloendothelial system, NOS C42.4 Hematopoietic system, NOS C76.0 Head, face or neck, NOS C76.1 Thorax, NOS C76.2 Abdomen, NOS C76.3 Pelvis, NOS C76.4 Upper limb, NOS C76.5 Lower limb, NOS C76.7 Other ill-defined sites C76.8 Overlapping lesion of ill-defined sites C77.0 Lymph nodes of head, face and neck C77.1 Lymph nodes of intrathoracic C77.2 Lymph nodes of intra-abdominal C77.3 Lymph nodes of axilla or arm C77.4 Lymph nodes of inguinal region or leg C77.5 Lymph nodes of pelvis C77.8 Lymph nodes of multiple regions C77.9 Lymph nodes, NOS C80.9 Unknown primary site **Note 1:** TNM is not defined for these sites. If directly assigning Summary Stage 2000 (SS2000), use the *Other and Ill-Defined Sites, Unknown Primary Site* chapter on page 287 of the [SS2000 on-line manual](https://seer.cancer.gov/tools/ssm/ssm2000/SSSM2000-122012.pdf#page=287). **Note 2:** Excludes hematopoietic & lymphoid neoplasms, and Kaposi sarcoma.

Data Items

Name Default Value Used for Staging NAACCR Item Required By Metadata
Year of Diagnosis <BLANK> No NAACCR #390 None
Primary Site <BLANK> Yes NAACCR #400 None
Histology <BLANK> Yes NAACCR #522 None

Initial Context

Staging Methods

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Outputs

Name Default Value Description NAACCR Item
Derived Version {{ctx_alg_version}} None
Derived SEER Clin Stage Group 88 NAACCR #3610
Derived SEER Path Stage Group 88 NAACCR #3605
Derived SEER Combined Stage Group 88 NAACCR #3614
Derived SEER Combined T 88 NAACCR #3616
Derived SEER Combined N 88 NAACCR #3618
Derived SEER Combined M 88 NAACCR #3620
Derived SEER Combined T Source <BLANK> NAACCR #3622
Derived SEER Combined N Source <BLANK> NAACCR #3624
Derived SEER Combined M Source <BLANK> NAACCR #3626