moh_can_basis_of_diagnsis_code

A code used to describe the single, most valid basis of diagnosis for a primary malignant tumour, or a secondary tumour if the primary tumour site is unknown or cannot be determined.

Notes: Examples include: death certificate only, clinical only, histology of primary etc. The basis of diagnosis code is sourced from laboratory reports, or inferred from the source of the registration. In other words, the registration source code and basis of diagnosis code need to be consistent. For instance if the registration source code is ‘Laboratory source’, then the basis of diagnosis code might be ‘Histology of primary’ but is unlikely to be ‘Clinical only’.