A mother with a left-sided acoustic neuroma is usually not hereditary. An acoustic neuroma is a benign tumor that appears in the sheath of the auditory nerve and is formed by the abnormal proliferation of cells in the sheath membrane on the surface of the nerve. Unilateral acoustic neuroma may be related to genetic variations or ionizing radiation, impulse noise, living habits and other factors, and patients may manifest hearing loss, vertigo, tinnitus, headache and other symptoms. Therefore, left-sided acoustic neuroma is generally not hereditary. However, for bilateral acoustic neuroma, there is a certain probability of inheritance, and most of them are autosomal dominant. If the left acoustic neuroma is a small tumor, it can be treated with Gamma Knife, while larger and symptomatic acoustic neuromas need to be removed by surgery. If your mother has a left acoustic neuroma, you should go to the hospital in time and follow the doctor’s instructions for treatment to avoid delaying your condition.