Absence of the Posterior Element of C1 and C2 Along With Mild Wedge Shape in Body of C3: Case Report

Due to the wide variety of cervical vertebral congenital anomalies, knowledge of their types and related clinical conditions can prove to be helpful for physicians and surgeons in the diagnosis and treatment of patients. The aim of this study is to report on a rare case of unstable cervical vertebral congenital anomaly in which the patient had a defect in the body of the C3 vertebra in addition to defects in the posterior arch of C1 and posterior element of C2. This type of anomaly has not been reported so far in the literature. To reduce the patient’s related neurological disorders, our treatment choice for this patient was occipitocervical fusion (OCF) surgery. At the 3-year postoperative follow-up, all sensory and motor problems related to this anomaly affecting the patient's upper and lower limbs and causing shoulder and neck pain were eliminated. In this rare type of anomaly, OCF surgery seems to be an effective choice in relieving the patient's neurological symptoms.