Solid Tumor Rules/Histology--Breast: What is histology code of a breast tumor with ductal carcinoma, lymphoepithelioma-like carcinoma type? See Discussion.
Solid Tumor Rules/Histology--Cervix: How is histology coded for a 2023 endocervical adenocarcinoma negative for high-risk human papilloma virus (HR-HPV) on Pap smear and strongly positive for p16 on biopsy? See Discussion.
Solid Tumor Rules/Histology--Cutaneous Melanoma: How is histology coded for a 2023 diagnosis of “early lentiginous melanoma in situ” of the skin? See Discussion.
Solid Tumor Rules/Histology--Fallopian Tube: How is histology coded for a high-grade serous carcinoma with admixed yolk sac tumor of the right fallopian tube? See Discussion.
Solid Tumor Rules/Histology--Head & Neck: What is the histology code of an external ear lesion when the dermatopathology report is the only available information (follow-up with the physician or pathologist is not possible) and the final diagnosis is malignant spindle cell neoplasm, most consistent with atypical fibroxanthoma? See Discussion.
Solid Tumor Rules/Histology--Head & Neck: How is histology coded for nasopharyngeal non-keratinizing squamous cell carcinoma, undifferentiated type? See Discussion.
Solid Tumor Rules/Histology--Head and Neck, Other Sites: Do human papilloma virus (HPV) histologies that occur with subtype/variants of squamous cell carcinoma (SCC) in various sites apply only to sites in Solid Tumor Rules, Head and Neck, Table 5 and Other Sites, Table 23? See Discussion.
Solid Tumor Rules/Histology--Head and Neck, Other Sites: Please provide clarification about effective dates for using p16 testing to assign HPV-related histology codes for various primary sites. See Discussion.
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