Which rules were implemented to guide cancer registries in determining the number of abstracts to prepare for solid tumors and how to assign the appropriate histology code for each primary tumor abstracted?

Which rules were implemented to guide cancer registries in determining the number of abstracts to prepare for solid tumors and how to assign the appropriate histology code for each primary tumor abstracted?

• A. Hematopoietic and Lymphoid Neoplasm Case Reportability and Coding Rules (Heme MP/H Rules)
• B. AJCC Cancer Staging Manual
• C. Multiple Primary and Histology Coding Rules (MP/H)
• D. NAACCR Standards

Answer: (C)

The key idea is how cancer registries decide how many abstracts to create for a patient’s solid tumors and how to assign the correct histology code for each primary. The Multiple Primary and Histology Coding Rules provide the criteria for determining when a second tumor is a new primary versus a spread of the first, and they specify the histology code to assign to each identified primary. This dual purpose—counting primaries and coding histology consistently—is exactly what registries need for solid tumors. Hematopoietic and Lymphoid Neoplasm Case Reportability and Coding Rules apply to hematopoietic/lymphoid cancers, not solid tumors, so they don’t fit the scenario. The AJCC Cancer Staging Manual focuses on staging rather than counting primaries or codifying histology. NAACCR Standards cover general data content and format but don’t provide the specific rules for determining multiple primaries or histology coding for solid tumors.

The key idea is how cancer registries decide how many abstracts to create for a patient’s solid tumors and how to assign the correct histology code for each primary. The Multiple Primary and Histology Coding Rules provide the criteria for determining when a second tumor is a new primary versus a spread of the first, and they specify the histology code to assign to each identified primary. This dual purpose—counting primaries and coding histology consistently—is exactly what registries need for solid tumors.

Hematopoietic and Lymphoid Neoplasm Case Reportability and Coding Rules apply to hematopoietic/lymphoid cancers, not solid tumors, so they don’t fit the scenario. The AJCC Cancer Staging Manual focuses on staging rather than counting primaries or codifying histology. NAACCR Standards cover general data content and format but don’t provide the specific rules for determining multiple primaries or histology coding for solid tumors.