MP/H Rules/Histology--Esophagus: How is histology coded for a biopsy of the esophagus with a pathologic diagnosis of "adenocarcinoma, intestinal type" when there is no evidence of a gastric tumor in scans or EDG? See Discussion.
MP/H Rules/Histology--Endometrium: How is histology coded when clear cell adenocarcinoma [8310/3] is stated to involve a "1.5 cm endometrial polyp"? See Discussion.
MP/H Rules/Histology--Corpus Uteri: Which MP/H rule applies in coding histology for a "high grade endometrioid adenocarcinoma with squamous differentiation (adenosquamous carcinoma)"? See Discussion.
MP/H Rules/Histology--Corpus uteri: How should histology be coded and how many primaries should be accessioned for an endometrial primary in which curettings showed malignant mixed mullerian tumor (carcinosarcoma) but hysterectomy specimen showed endometrioid adencarcinoma? See Discussion.
MP/H Rules/Histology--Colon: Which MP/H rule applies and what is the histology code for a "large cell neuroendocrine carcinoma (arising in adenocarcinoma)"? See Discussion.
MP/H Rules/Histology--Colon: When the microscopic description indicates a colon tumor is "tubulovillous," but the final diagnosis only states "adenocarcinoma," is the histology coded to 8263/3 [adenocarcinoma in a tubulovillous adenoma]?
MP/H Rules/Histology--Colon: What histology would be coded when the right colon demonstrates a combined adenocarcinoma and high grade small cell neuroendocrine carcinoma [forming the dominant component] arising in a villotubular adenoma and the liver biopsy demonstrates metastatic high grade small cell neuroendocrine carcinoma?
MP/H Rules/Histology--Colon: The final diagnosis on a path report for a colon specimen says: Is a colon specimen final diagnosis of carcinoma in situ in a serrated adenoma coded to 8010/2, 8210/2 or 8213/2?
MP/H Rules/Histology--Colon: Regarding histology rule H21, is there a hierarchy or do you code the higher histology if there is an adenocarcinoma arising in a polyp and an adenocarcinoma in a villous adenoma?
MP/H Rules/Histology--Colon: Per MP/H rule H3 for colon, code 8144/3 [Adenocarcinoma, intestinal type] should not be used with C180-C189 [colon]. However, page 58 of the ICD-O-3 SEER Site/Histology Validation list of February 9, 2001 lists code 8144/3 as a valid histology for large intestine. See Discussion.
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