Histology--Kidney: What is the histology code for renal cell clear cell of the kidney with subsequent epithelioid angiomyolipoma PEComa of the liver stated to be metastatic? Case originaly diagnosed in 2016. See discussion.
Histology--Lung: Is there a better code for SMARCA4-deficient malignant neoplasms than 8000/3 that could be used especially given its aggressive nature? This term is not included in the Lung Solid Tumor Rules or ICD-O-3.1 and 3.2. See Discussion.
Histology--Lung: Is it acceptable to code histology as 8042/3 for a 2020 lung primary when the pathology report states only "oat cell carcinoma?" See Discussion.
Histology--Lymphoma: What code is used to represent the histology "monomorphic post-transplant lymphoproliferative disorder [diffuse large B-cell lymphoma]"? See Description.
Histology--Penis: What is the histology code of a glans penis primary with the final diagnosis squamous cell carcinoma, verrucous type? See Discussion.
Histology--Soft Tissue: How is histology coded for malignant neoplasm with neuroectodermal differentiation and TPR-NTRK1 gene rearrangement diagnosed on left shoulder excision? See Discussion.
Histology--Thyroid: Should any mention of encapsulated be included in the histology coding (8343/3 vs. 8260/3) for papillary thyroid carcinoma cases? See Discussion.
Histology--Thyroid: What is the correct histology code for a thyroid resection showing papillary carcinoma, tall cell variant with oncocytic features with 30% of largest tumor (right) is tall cell variant and both foci contain benign multinucleated giant cells? See Discussion.