We are revising the criteria in parts A and B of the Listing of Impairments (listings) that we use to evaluate claims involving cancer (malignant neoplastic diseases) under titles II and XVI of the Social Security Act (Act). These revisions reflect our adjudicative experience, advances in medical knowledge, recommendations from medical experts we consulted, and public comments we received in response to a Notice of Proposed Rulemaking (NPRM).