<prompt> Which of the following conditions is associated with Hypothyroidism:Hoshimotos ThyroiditisGraves DiseaseToxic Multinodular GoiterStruma ovary  <response>: Answer is A Hoshimotos Thyroiditis : Hoshimotos Thyroiditis is associated with autoimmune hypothyroidism. Graves disease, Toxic Multinodular Goiter and Struma Ovarii are all associated with primary hypehyroidism Causes of Hypehyroidism Thyrotoxicosis Primary hypehyroidism Graves disease Toxic multinodular goiter Toxic adenoma Functioning thyroid carcinoma metastases Activating mutation of the TSH receptor Activating mutation of GSa Mc-Cune Albright syndrome Struma ovarii Drugs: iodine excess Jod-Basedow phenomenon Thyrotoxicosis without hypehyroidism Subacute thyroiditis Silent thyroiditis Other causes of thyroid destruction: amiodarone, radiation, infarction of adenoma Ingestion of excess thyroid hormone thyrotoxicosis factitia or thyroid tissue Secondary hypehyroidism TSH-secreting pituitary adenoma Thyroid hormone resistance syndrome: occasional patients may have features of thyrotoxicosis Chrionic gonadotropin-secreting tumors Gestational thyrotoxicosis 