English: This 59 year-old patient presented with a left facial droop and a known history of multiple myeloma. A CT brain was performed looking for a cerebral cause. The brain appeared normal. Close inspection revealed a lytic lesion in the left temporal bone, and focused reconstructions of the petrous temporal bones confirmed a lytic lesion involving the mastoid segment of the facial nerve canal. Red arrows: lesion; green arrow: normal contralateral facial nerve canal. The lytic lesion was one of many in the skull and is consistent with a myeloma deposit.