Person with cancer—histopathological grade, code N
Identifying and definitional attributes
|Metadata item type:||Data Element|
|Short name:||Histopathological grade|
|Definition:||The histopathological grade or differentiation in a person with cancer, as represented by a code.|
|Data Element Concept:||Person with cancer—histopathological grade|
Value domain attributes
|Maximum character length:||1|
Data element attributes
Collection and usage attributes
|Guide for use:|
Histopathological grade or differentiation describes how little the tumour resembles the normal tissue from which it arose.
Only malignant tumours are graded and only one code can be recorded.
When more than one grade is documented for the primary tumour within the same specimen report, use the highest grade. For example, if grade 2-3 is documented, record the grade as 3.
If the grades differ on multiple pathology reports for the same tumour, use the value from the larger specimen (for example, the grade from a surgical excision specimen would be used over the grade from a specimen from a diagnostic biopsy).
Breast cancer coding rules:
Use the Nottingham grade (Elston-Ellis modification of Bloom-Richardson grading system). This classification only uses grades 1-3, 9.
For an invasive tumour with an in situ component, record the grade for the invasive component only. If the grade of the invasive component is not reported, record the grade as unknown.
Cancer registry use:
Collection of this data item should only be from notification and pathology reports relating to initial diagnosis and not for recurrent or metastatic disease.Only malignant tumours are graded.
Source and reference attributes
World Health OrganizationCommission on Cancer American College of Surgeons
Fritz A et al. 2000. International Classification of Diseases for Oncology, Third edition (ICD-O), 3rd edition. Geneva: World Health Organization
American College of Surgeons 1998. Standards of the Commission on Cancer Registry Operations and Data Standards (ROADS), Volume II, Commission on CancerJohnson CH & Adamo M (Editors) 2007. SEER Program Coding and Staging Manual 2007. MD 2007. Bethesda: National Cancer Institute, NIH Publication number 07-5581
|Related metadata references:|
Supersedes Person with cancer—histopathological grade, code N
|Implementation in Data Set Specifications:|
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