A Primary Hydatid Cyst of Thyroid Gland

A 34-year-old female patient presented to the general surgery clinic of the hospital complaining of a growing tangible swelling in her neck. In physical examination, patient had two palpable soft nodules in the left lobe of the thyroid without invading to surrounding tissues. The function of thyroid gland was normal and Fine needle aspiration (FNA) result reported benign. Patient went through left lobectomy and isthmectomy. The result of Histopathology reported nodular hyperplasia and a hydatid cyst. After surgery, the patient was examined exactly searching for any other organs cyst, but there was no cystic lesion in the cranial, thoracic and abdominal cavities. Accordingly, the case was a primary thyroid hydatid cyst, which is completely scarce even in endemic regions like Iran.