Ectopic thyroid tissue (ETT) was usually discovered in head and neck region, adrenal ETT was rare reported in literature. Here is a report of adrenal gland cyst with ETT in a 49-year old woman who was admitted to our hospital for health care. CT scan demonstrated a mass in left adrenal gland, and surgical resection was prepared. The mass was cystic, composed of normal adrenal and ectopic thyroi...