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Sudden deafness due to carbon monoxide poisoning
  1. Mahreen Razzaq1,
  2. Swathi Dumbala2,
  3. Shyam S Moudgil2,3
  1. 1Department of Family Medicine, St John Hospital and Medical Center, Detroit, Michigan, USA
  2. 2Internal Medicine, St John Hospital and Medical Center, Detroit, Michigan, USA
  3. 3Neurology, St John Hospital and Medical Center, Detroit, Michigan, USA
  1. Correspondence to Dr Shyam S Moudgil, 20867 Mack Avenue Ste#6, Grosse Pointe, MI 48236, USA; shyammd.moudgil{at}stjohn.org

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Case report

A 53-year-old man presented to an urgent care centre with sudden deafness. The CT scan of the head was normal, and he was transferred to a tertiary hospital. At first, the patient was slightly disoriented and unable to provide much detail about the onset of his symptoms but recalled driving to the urgent care centre. He complained of dull bifrontal headache and ringing in the ears. He denied any history of trauma or exposure to ototoxic drugs. On examination, he had a profound hearing impairment but was able to read and write. His remote memory was intact. There was no anomia, dyslexia, dyscalculia or right–left confusion. He …

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