Pyriform sinus fistula is a congenital fistula, frequently found in patients with acute suppurative thyroiditis. 2 The fistula arises from the apex of the pyriform recess and often ends in (or in ...

The sinus pyriform fistula has to be resected ‘en bloc’ with the cyst. In our case, thulium-laser coagulation of the apex of the fistula was performed with no recurrence after 1 year of follow-up.