[Longitudinal myelitis in systemic lupus erythematosus]

Myelitis occurs in less than 5% of the patients during the disease course of systemic lupus erythematosus (SLE). Longitudinal myelitis, characterized by inflammatory involvement of at least four medullar segments, is a particular form of myelitis.

We report a 31-year-old woman with SLE, admitted for paraparesia and delirium. Lumbar puncture and MRI led to the diagnosis of longitudinal myelitis. The patient rapidly improved after corticosteroid therapy.

Transverse myelitis in SLE patients has been already commonly reported, but longitudinal myelitis is uncommon. Longitudinal myelitis has to be suspected in case of paraplegia or tetraplegia, with sensory defects and bladder dysfunction. MRI shows typically T2 medullar hypersignals. This may result in neurologic sequela. Cyclophosphamide has been used in patients where corticosteroids were inefficient.