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Key Clinical Message Whenever an enlarging mass is seen in throat, possibility of lingual thyroid should be considered. Thyroid function test should be done whenever ectopic thyroid is detected. Imaging (ultrasonography or Tc‐99m scintigraphy) is adequate for diagnosis. Conservative treatment with levothyroxine helps in reducing size of lingual thyroid. Abstract Hashimoto thyroiditis in lingual thyroid results in enlargement of the thyroid gland and oropharyngeal symptoms. Suppression therapy with levothyroxine results in reduction in size of the gland. We present an interesting case of Hashimoto disease in an adolescent female presenting as oropharyngeal mass.