A 44-year-old man presented with a diffuse, asymptomatic swelling of the lower lip which he claimed had been present for nine months. The patient reported a previous episode of swelling that occurred in the same location but then resolved. He was not experiencing pain, facial nerve palsy, tenderness, or pruritus associated with the lesion, and he was afebrile. No history of trauma to the area was admitted. Antihistamines and aclometasone dipropionate cream .05%, prescribed by his dermatologist, had failed to reduce his swelling.
After you have finished reviewing the available diagnostic information, make the diagnosis.
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