Abscess formation of the left cheek region. The transcervical view to the cheek shows a hypoechoic to anechoic space-occupying lesion overlying the middle and distal part of Stensen’s duct. The formation was irregularly shaped with ill-defined borders and small intra-lesional hyperechoic reflexes representing thick secretion and/or air-producing bacteria. Sialolithiasis is recognized as the main reason and must always be excluded. A sialolith was also visible in this case characterized by a hyperechoic reflex measuring 5.7 mm (dotted line). Abbreviations: MM, masseter muscle; OC, oral cavity, SL, sialolith; ABSC, abscess.