| Obligatory | 1. Radioactive iodine therapy: Must not donate if: a) For malignancy. b) Administered in the preceding six months. 2. Other treatment or investigation: Refer to a Designated Medical Officer. |
| Discretionary | Eyes: If related to malignancy, see Malignancy. |
| See if Relevant | Malignancy Thyroid Disease |
| Additional Information | In general those used for diagnostic purposes are cleared within 24 hours. Some, e.g. radioactive iodine, have long half-lives and affected donors must not be accepted unless at least six months have passed. |
| Reason for Change | A 'Discretion' has been added for 'Eyes'. |