Site-Specific Factor 2

Retinoblastoma (RB) Gene Mutation


**Note:** Information is collected on the germline mutation of the retinoblastoma (RB) gene. Typically tumor tissue is tested to identify the presence of the mutation. Peripheral blood lymphocytes are tested to determine if the RB gene is a germline mutation (inherited). * Code the results of testing as reported in the medical record




NAACCR #2890
Code Description
000 Germline retinoblastoma (RB) gene mutation not present
010 Germline RB gene mutation present
988 Not applicable: Information not collected for this case
997 Test ordered, results not in chart
998 Test not done (test not ordered and not performed)
999 Unknown or no information
Not documented in patient record