Posterior Hypoplastic C1 Arch with Neurological Deficits ? A Case Report

Hypoplastic C1 posterior arch, a rare anomaly ranges from partial cleft to total agenesis which is a result of developmental failure of chondrogenesis, which is always missed as a diagnosis until only when symptomatic and is usually surgically treated. However, preventing cumulative trauma to the cord by surgery at early stage is debatable. We present a case of 36 years female patient with paraesthesia in all four limbs and weakness of right hand grip and triceps. Patient was investigated with dynamic X ray of CVJ, CT scan with 3D reconstruction and MRI. Posterior hypoplastic arch excision was done without a need for stabilisation as there was no segmental instability.