• Primary Meige syndrome was diagnosed by an experienced neurologist.

• All patients had received systematic and regular treatment for at least 1 year before surgery, including oral drugs and local injection of botulinum toxin A, but the efficacy was not apparent, as the ability to engage with daily life and the quality of life of the patients significantly decreased.

• Tere were no other serious systemic diseases, such as severe organic heart disease, severe lung, liver and kidney dysfunction, and coagulation dysfunction.

• Tere was no history of neurological diseases other than Meige syndrome, such as Parkinson's disease or severe cognitive dysfunction.

• Tere were no serious psychiatric disorders, such as schizophrenia.

• Preoperative head magnetic resonance imaging (MRI) examinations were normal. Patients of missing follow-up and incomplete clinical data were excluded from the cases.