A patient presented with a 10-cm right-sided facial mass extending under the auricle from the mastoid to the zygoma and inferiorly to the angle of the mandible. A core biopsy specimen demonstrated a spindle cell proliferation with abundant collagen that stained focally with CD34, smooth muscle actin, and bcl-2. What is the diagnosis?
JAMA Otolaryngology - Head & Neck Surgery – American Medical Association
Published: Jun 1, 2015