A 34-year-old man presented with a 1-month history of a slowly growing mass on the rightside anterior neck. The patient did not present any symptoms related to the neck mass. On physical examination, a compressible, non-pulsatile mass on the neck was enlarged with the Valsalva maneuver (Video). The Doppler ultrasound demonstrated a low-flow vascular lesion in the right-side of the neck. Non-contrast computed tomography (CT) scan showed a isodense mass about 2.7 cm with phleboliths which was heterogeneously enhanced after contrast media administration (Fig. 1). On magnetic resonance imaging (MRI), the mass appeared hyperintense on the fat-saturated T2-weighted image and had low signal-intensity foci which was indicative of phleboliths (Fig. 2). The mass showed diffuse enhancement on the enhanced T1-weighted image. Based on these findings, the patient was diagnosed with a venous malformation. Although the main treatment of venous malformation is sclerotherapy, the patient underwent surgical excision. A histopathological examination of the resected specimen was consistent with venous malformation. The patient is doing well on follow-up. This study was approved by the institutional review board of the Chonnam National University Hwansun Hospital.