The severity of the left parietal lobe high signal enhancement on magnetic resonance of the brain depends on the characteristics of the lesion and the combination of clinical symptoms to determine whether it is serious or not. It may be a malignant tumor, which is more serious, or it may be a benign disease or inflammation, which may not be serious. Magnetic resonance imaging (MRI) consists of a scanning examination and an enhancement examination. Enhanced MRI involves injecting a contrast agent to increase the contrast of the image and show the lesion more clearly. The T1 phase is usually used for the enhancement scan, and the lesion will show enhancement at T1. Tumors have a higher density of blood vessels than normal tissue, and their uptake of contrast is higher than that of normal or benign tissues, resulting in a significant increase in density, or enhancement, of the lesion after enhancement. Therefore enhancement is caused by malignant tumors and is more serious. In some benign lesions, such as inflammation, mild enhancement of the lesion after enhancement can occur because the inflammatory process is also accompanied by an increase in blood supply. It can improve with treatment for the cause and therefore may not be serious. Regardless of whether the enhancement is mild or obvious, imaging examination can only be used as an auxiliary diagnostic tool, and the most accurate way to distinguish benign from malignant is pathologic examination. The most accurate way to distinguish benign from malignant is pathological examination. It is recommended to consult a neurologist and ask the specialist to make a judgment by combining other examinations and clinical manifestations.