Patient: Description of condition (onset, main symptoms, hospital visited, etc.): Since birth, he has not passed the hearing screening in his left ear, and at 6 months of age, he had an ABR test to determine that he could not hear sounds, but was not sure where the problem was. He has no symptoms and is sensitive to sound, but he always scratches his ears, tilts his head to the left, and is always startled by sound. She has been to Futian Women’s and Children’s Hospital, Longgang Women’s and Children’s Hospital and Shenzhen People’s Hospital. There is no treatment, but the doctor just told him to keep an eye on him and have a checkup after he turns one week old. I would like to know the cause of the disease, how to treat it, the usual precautions, and the risks of treatment. Luo Renzhong, Department of Otolaryngology, Guangzhou Children’s Hospital: Please attach a detailed full set of hearing test report. A single ABR test does not reflect the details of hearing damage, so it cannot answer what you want to know. Patient: Thank you for your hard work! I am now sending you my baby’s test report and hope to get your guidance. Luo Renzhong, Department of Otolaryngology, Guangzhou Children’s Hospital: The attached hearing report shows: normal hearing in the right ear and severe sensorineural deafness in the left ear (lesion in the cochlea). This is only a hearing test and no definite cause can be known. It is recommended that a thin CT scan of both ears be done after the first year of age to find out if there are any abnormalities in the inner ear structure, which may reveal the cause. It is not uncommon to have normal hearing on one side and not be able to hear at all on the other side. Personal opinion is that the left ear does not need special treatment (hearing aids or cochlear implants are not recommended). Take care to avoid ototoxic drugs and noise in your daily life.