Preservation of Echogenicity in Type II Amiodarone-Induced Thyrotoxicosis: Possible Histopathological Basis

摘要

Normal thyroid echogenicity is due to reflection of acoustic waves at the thyrocyte-colloid interface. His- tology reports detailing AIT-II are scarce because surgical management is the exception rather than the rule. None- theless, available reports describe the coexistence of col- loid-distended follicles and disrupted follicles filled with foamy histiocytes (1, 2).