spontaneously resolving hyperthyroidism ( srh ) is a transient form of hyperthyroidism characterized by a painless , nontender , normal-sized or slightly enlarged thyroid gland , elevated levels of thyroxine and triiodothyronine , a depressed thyroid radioactive iodine uptake ( raiu ) , spontaneous resolution in two to five months , and a focal or diffuse lymphocytic thyroiditis on biopsy .
C0018021
enlarged thyroid gland
C0041014
triiodothyronine