Multiple myeloma occurring in association with a preexisting neuromuscular disease (progressive muscular dystrophy). A chance occurrence or a nosological entity?

This paper describes 3 patients with progressive limb-girdle muscular dystrophy who many years after this disorder was diagnosed were found to have a monoclonal gammopathy. The authors examine whether this was a fortuitous occurrence together of two rare disorders or whether they might be causally related. So far no other similar cases have been reported in the literature.