Histology (Pre-2007)/Grade, Differentiation--Brain and CNS: What code is used to represent the histology and grade for "WHO-II astrocytoma, grade II" of the brain when the WHO-II classification is different from the classification systems previously used? See discussion.
Histology (Pre-2007)/Grade, Differentiation--Lung: What code is used to represent the histology for a lung biopsy of "non-small cell carcinoma with features of poorly differentiated adenocarcinoma"? See discussion.
Histology (Pre-2007)/Grade, Differentiation: What code is used to represent the histology "cystadenocarcinoma with multiple foci of high grade anaplastic and undifferentiated sarcoma"? See discussion.
Histology (Pre-2007)/Grade, Differentiation: What code is used to represent the histology of "well differentiated low grade lipoma-like liposarcoma (atypical lipoma)"? See discussion.
Histology (Pre-2007)/Grading--Head & Neck: Can terms that commonly modify histologic types or grades be used if they are only expressed in the microscopic portion of the pathology report? See Description.
Histology (Pre-2007)/Multiple Primaries (Pre-2007)--Breast: What code is used to represent histology for a case with a biopsy specimen that reveals "infiltrating ductal carcinoma with ductal carcinoma in situ, comedo subtype, non-extensive" in one quadrant of the breast and a mastectomy specimen with "invasive pleomorphic lobular carcinoma with lobular carcinoma in situ" in another quadrant of the breast? Paget disease is identified in the nipple section.
Histology (Pre-2007)/Primary Site/EOD-Extension--All Sites: How do you code these fields for a resected thyroid that is negative for any diagnostic abnormality and a left ovary that demonstrates "papillary thyroid carcinoma arising in a cystic teratoma"? See discussion.
Histology (Pre-2007): Can adenocarcinoma in either a villous or tubulovillous polyp or adenoma be coded as histology for sites other than colon or rectum? See discussion.
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