Drop finger as an adjacent segment disease after cervical expansive laminoplasty

摘要

Sir, We would like to report two cases showing drop finger as an adjacent segment disease after cervical expansive laminoplasty. Case 1: The first case is about a 71-year-old male with complained of acute right finger drop 3 years after C3-C7 laminoplasty. He could not extend his metacarpophalangeal joint of right finger. Magnetic resonance imaging (MRI) and computerized tomography myelogram revealed a right CT-Thl foraminal stenosis caused by osteoarthritis of facet joint [Figure 1]. Aplainradiogramshowedlimitation of motion in C3-C7 (35.6° pre-operatively and 22.2° post-operatively). Electromyogram showed neurogenic discharge in extensor digitorum communis muscle and hand intrinsic muscles. The patient refused for the surgical option. The symptoms remain unchanged.Case 2: A 64-year-old woman complained of finger drop of her right hand 2 years after C3-C7 laminoplasty. MRI revealed aright C7-Th1 foraminal stenosis. Plain radiograms showed limitation of motion in C3-C7. The patient refused surgical option. The symptoms remain unchanged.