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A teenage boy presented with a 3-month history of a left preauricular mass. His medical history was notable for an atypical teratoid rhabdoid tumor of the left temporoparietal lobe diagnosed at age 3 years, which had been resected and treated with chemoradiation. Physical examination demonstrated a 2-cm firm, nontender, mobile mass without overlying skin involvement. There was no palpable lymphadenopathy, but weakness of the frontal branch of the left facial nerve was noted. Magnetic resonance imaging (MRI) of the neck revealed a 1.0 × 1.7 × 1.9-cm mildly enhancing mass lateral to the left subcondylar mandible, which was inseparable from the anterior parotid gland (Figure, A).
Marcus S, Waltonen JD, Sirintrapun SJ, Whigham AS. A Left Preauricular Mass. JAMA Otolaryngol Head Neck Surg. 2013;139(9):951-952. doi:10.1001/jamaoto.2013.4043