Low-flow venous malformations (eg, cavernous hemangiomas) in the head and neck most frequently occur in the floor of the mouth or the buccal space. On MR imaging and CT they appear either:

• predominantly cystic lesions eliciting high-signal-intensity on T2-fat-saturated images
• or solid lesions with isointense signal similar to the muscular signal intensity

The lesions may contain calcified phleboliths, which appear as round foci signal on MR of dark signal and show high attenuation on CT images as in our case.