Clenched Fist Syndrome in an Adolescent Girl

摘要

A 14-year-old girl presented to our department with a 1-month history of persistent extension of left arm, clenching of both fists, and plantar flexion of the toes on both feet. The onset of symptoms was abrupt and symmetrical. She also complained of difficulty in swallowing and breathing, leading to reduced appetite and sleep. She reported another episode of neck extension 1 year ago, which resolved spontaneously in 10 days after taking calcium and vitamin supplements.