Increasingly found with intravenous drug abuse. Other Cystic Masses Dermoids usually supraglottic, usually midline, may contain fat. Teratoma often mid-line and may have calcification. Hemangioma Most common neck mass in kids. May affect oral pharynx and face as well as neck.
Cavernous type is the most common.
May have bright signal on T2 due to slow flow. May present as a solid mass with diffuse enhancement. AVMS and AV Fistulas May present with unusual flow voids, vascular channels, or bright areas of slow flow in venous portions. Well defined area of fibrosis, locally infiltrating. Most common in superclavicular area.