This item is the product of the application of the conversion rules expressed in ICDO2-3_SEER.xls (http://seer.cancer.gov/tools/conversion/index.html) for cases diagnosed prior to 2001, which were originally coded according to ICD-O-2, and ICD-O-3 codes reported by facilities for cases diagnosed in 2001 or later.
Note: the xls file was modified from that available from the SEER web site – behavior code 1 associated with juvenile astrocytomas (9421) has been changed to 3 by agreement among North American registry standard setters, making it consistent with ICD-O-2.
Benign tumors or tumors of uncertain behavior (behavior codes 0, 1) are not reported to the NCDB except for the following sites: meninges (C70._), brain (C71._), spinal cord, cranial nerves, and other parts of central nervous system (C72._), pituitary gland (C75.1), craniopharyngeal duct (C75.2) and pineal gland (C75.3). These were not required to be reported until 2004.
|Code||Label||Definition and Examples|
|1||Borderline||Uncertain whether benign or malignant|
|Low malignant potential|
|Uncertain malignant potential||2||In situ and/or carcinoma in situ||Adenocarcinoma in an adenomatous polyp with no invasion of stalk|
|Clark level 1 for melanoma (limited to epithelium)|
|Comedocarcinoma, noninfiltrating (C50.B)||2||Synonymous within situ||Confined to epithelium|
|Hutchinson melanotic freckle, NOS (C44.B)|
|Involvement up to, but not including the basement membrane|
|Lentigo maligna (C44.B)|
|Lobular neoplasia (C50.B)|
|Lobular, noninfiltrating (C50.B)|
|No stromal involvement|
|Papillary, noninfiltrating or intraductal|
|Precancerous melanosis (C44.B)|
|Queyrat erythroplasia (C60.B)|
|3||Invasive||Invasive or microinvasive|