Symmetric Pseudoathetosis of Hands and Feet: A Rare Manifestation of Subacute Combined Cord Degeneration with Life-threatening Thromboembolic Risk (P9-7.010)

Vitamin B12 deficiency can cause subacute combined degeneration (SACD) by disrupting myelin synthesis, leading to spinal cord degeneration. We present a unique case of SACD featuring symmetrical pseudoathetosis characterised by involuntary, slow, and writhing movements resulting from proprioceptive sensory impairment, which disrupts the brain’s ability to accurately perceive limb position and movement and pulmonary embolism due to elevated homocysteine levels.