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Malignant peripheral nerve sheath tumors (MPNSTs) are sarcomas derived from peripheral nerves and have high rates of local recurrence and metastasis. We report a case of an MPNST on the cheek that was discovered following trauma. A 75-year-old man experienced a fall while riding a bicycle and injured his face. The swelling of his left cheek did not improve, and he was referred to our department. No bone fracture was observed on image-based examination, and the patient was followed up. Magneticdoi:10.5981/jjhnc.47.388 fatcat:5l2gwacknveclhpklpd362hfpq