Hypothyroidism after external irradiation to the thyroid region.
D000328:Adult; D000368:Aged; D006801:Humans; D007037:Hypothyroidism / Q000209:etiology*; D007822:Laryngeal Neoplasms / Q000532:radiotherapy*; D008875:Middle Aged; D010610:Pharyngeal Neoplasms / Q000532:radiotherapy*; D011830:Radiation Effects; D013961:Thyroid Gland / Q000528:radiation effects*