Histology (Pre-2007)--Ovary: What codes are used to represent "mixed papillary serous and clear cell carcinoma" and "papillary serous carcinoma with focal clear cell features" of the ovary?
Histology (Pre-2007)--Pancreas: Is a "composite mucinous adenocarcinoma and squamous cell carcinoma" coded to 8560 [adenosquamous carcinoma] or should 8480 [mucinous adenocarcinoma] be coded rather than 8070 [squamous carcinoma] because mucinous adenocarcinoma is a higher histology code than squamous carcinoma?
Histology (Pre-2007)--Lung: Does 8070 [squamous cell carcinoma], 8560 [adenosquamous carcinoma] or 8255 [adenocarcinoma with mixed subtypes] best represent this field for a lung biopsy described as a "poorly differentiated non-small cell carcinoma with squamous and glandular features with focal mucin positivity per mucin stain"?
Histology (Pre-2007)--Melanoma: Is the code 8740/3 [malignant melanoma in a junctional nevus] to be used when the pathologic diagnosis is "malignant melanoma arising in a compound nevus"?
Histology (Pre-2007)--Corpus uteri: How is a polyp with "endometrial carcinosarcoma (Malignant Mixed Mullerian tumor), endometrial adenocarcinoma, and some areas of high grade spindle sarcoma" coded? See Discussion.
Histology (Pre-2007)--Lung: What is the correct histology code for this case of squamous cell carcinoma with several different variants? See Discussion.
Histology (Pre-2007)/Diagnostic Confirmation: Which histology code is preferred if the CBD brushing is positive for malignant cells, cytologically most consistent with ductal adenocarcinoma [8500/3], and the common hepatic artery lymph node biopsy has metastatic adenocarcinoma, consistent with cholangiocarcinoma [8160/3]?
Histology (Pre-2007)/Behavior Code: What code is used to represent the histology "foci of well differentiated intramucosal carcinoma [carcinoma in situ] arising on the surface of a tubular adenoma"? The pathologist referred to this colon biopsy as "in situ".
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