Ultrasound-guided fine needle aspiration biopsy (FNAB) is a safe and easy method to evaluate the nature of thyroid nodules with very high diagnostic accuracy. Complications after FNAB are unlikely to develop in experienced hands and development of a clinically important hematoma is extremely rare. Careful ultrasonographic examination and evaluation of the possible trace of needle via Doppler technique prior to FNAB, in order not to miss an important vascular structure on the way is advised. Thyroid gland is supplied by superior and inferior thyroid arteries. Superior thyroid artery is usually stable but inferior thyroid artery may show anatomical variations.
Here we report a case with an unexpected observation of inferior thyroid artery within the thyroid parenchyma. To our knowledge, this is the first case with inferior thyroid artery embedded within the thyroid parenchyma, in literature.
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