This document provides guidelines for blood donors with a history of malignancy in different countries. Individuals with a current or past history of solid organ or hematological malignancy are generally not able to donate blood. However, there are some exceptions, such as certain cases of basal cell carcinoma, squamous cell carcinoma, or carcinoma in situ of the cervix. Donors with a genetic/familial predisposition to malignancy may be able to donate depending on the specific circumstances. The document also discusses concerns about the risk of adverse reactions or transmission of malignancy to recipients. The policy for donors with a past history of solid organ malignancy is currently being reviewed. [Extracted from the article]