Histology/Behavior--Brain and CNS: How should Histology and Behavior be coded for a polymorphous low-grade neuroepithelial tumor of the young (PLNTY) arising in the brain?
Histology/Behavior--Brain and CNS: How are these fields coded for an "anaplastic glioneuronal neoplasm with spongioblastic architecture"? See Discussion.
Histology--Vulva: How is the histology coded for vulvar intraepithelial neoplasia III (VIN III)/Squamous cell carcinoma in situ from a pathology report of the vulva, 8070/2 for squamous cell carcinoma in situ or 8077/2 for VIN III? The rules do not discuss this particular situation.
Histology--Thyroid: What is the correct histology code for a follicular carcinoma, minimally invasive, oncocytic variant of the thyroid? See Discussion.
Histology--Thyroid: What is the correct histology code for a thyroidectomy with final diagnosis of “Right lower lobe: papillary microcarcinoma, conventional type, 0.8 cm. Isthmus: papillary microcarcinoma, follicular variant, 0.2 cm. Left lobe: Papillary carcinoma, conventional, unencapsulated.” 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.
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.