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SEER Inquiry System - Report
Produced: 11/26/2024 11:56 PM
Question 20200078
Inquiry Details
References:
Solid Tumor Rules. Malignant CNS; December 2020 Update
Question:
Solid Tumor Rules (2018)/Histology--Brain and CNS: Should the new malignant term pituitary blastoma be added to Table 3 of the 2018 Malignant Central Nervous System (CNS) and Peripheral Nerves Solid Tumor Rules? See Discussion.
Discussion:
Pituitary blastoma was not added to Table 3 (Specific Histologies, NOS, and Subtypes/Variants) of the 2018 Malignant CNS and Peripheral Nerves Solid Tumor Rules as part of the December 2020 update. This is a new malignant CNS histology for 2021 and later. Not including this histology in Table 3 results in the registrars being required to check another source to correctly code this histology. If this histology cannot be used for cases diagnosed prior to 2021, should that diagnosis year clarification be included in the STR?
This question was prompted from preparing SEER*Educate coding exercises. We will use the answer as a reference in the rationales.
Answer:
The Solid Tumor Malignant CNS tables do not list pituitary specific histologies at this time. Registrars will need to refer to ICD-O and/or updates until the decision to add malignant pituitary neoplasms is made. Pituitary blastoma is a rare tumor which occurs in children.
