Simultaneous thyroglossal duct cyst with parathyroid cyst: A case report

Figure 1 Ultrasonography revealed a thylohyoid cyst and a cystic mass in the left thyroid lobe. A: The anechoic echo, slightly off-midline to the left, between the thyroid cartilage and strap muscles, without wall inflammation; B: The cystic mass at the lower pole of the left thyroid lobe of the patient.

Figure 2 Computed tomography scan images. A: The hypodense foci, slightly off-midline to the left, at the left front of the hyoid; B: The lesion at the rear of the lower pole of the left thyroid lobe of the patient.

Figure 3  Histochemistry: Cytochemistry immunohistochemistry chromogranin A (+); SynapsinI (-); thyroglobulin (-); thyroid transcription factor-1 (-); cytokeratin 19 antigen (-); nuclear protein Ki-67 about 2%, consistent with parathyroid cyst (hematoxylin and eosin stain, 100×).