Unusual Spinal Cord Lesions in Late-Onset Non-ketotic Hyperglycinemia

Non-ketotic hyperglycinemia is a disorder of glycine metabolism with severe neurologic regression in the infantile stage, while late-onset non-ketotic hyperglycinemia is a rare form characterized by variable clinical, biochemical, and imaging features. This report describes a boy of late-onset non-ketotic hyperglycinemia presenting with an unusual long tract-like lesion of the spinal cord aside by magnetic resonance imaging. This is the first reported child of non-ketotic hyperglycinemia with abnormal imaging features of spinal cord.