Reversible myeloradiculopathy due to Mycoplasma pneumoniae

A 22-year-old man presented with flaccid paraparesis and a thoracic sensory level in the context of a recent respiratory illness. Investigations established cerebrospinal pleocytosis with elevated protein, and subsequent serological testing confirmed raised antibody titres to Mycoplasma pneumoniae. Nerve conduction studies established that H-reflexes were prolonged and somatosensory evoked responses were delayed from the lower limbs bilaterally. Although imaging of the spinal cord revealed no abnormality, clinical and neurophysiological findings were consistent with a myeloradiculopathy. The patient was treated with pulse intravenous methylprednisone and underwent complete recovery over a 4-week period.