title: T3 thyrotoxicosis in a child.
abstract: We report the case of a 5-year-old hyperthyroid boy with normal serum T4 levels are elevated serum T3 levels. The findings are diagnostic of T3 thyrotoxicosis, a condition that has been very infrequently reported in childhood. We postulate that low dietary iodine intake may be an etiologic factor in some cases of T3 thyrotoxicosis.
mesh_terms: D002675:Child, Preschool; D006801:Humans; D006980:Hyperthyroidism / Q000097:blood* / Q000175:diagnosis / Q000209:etiology; D008297:Male; D013974:Thyroxine / Q000097:blood; D014284:Triiodothyronine / Q000097:blood*
chemical_list: D014284:Triiodothyronine; D013974:Thyroxine