Dermatomyositis developing in a Duchenne muscular dystrophy carrier

SIR, Duchenne muscular dystrophy (DMD) is the commonest musculardystrophy and its clinical manifestations are well recognized.Less commonly female carriers can become symptomatic, with symptomsranging from mild generalized weakness to inability to walk.Manifesting carriage of DMD is a rare but important cause ofproximal muscle weakness in females, but other diagnoses needto be excluded. A 42-yr-old lady presented with a lifelong history of fluctuatingproximal muscle weakness, fevers, clumsiness and falls. Herbrother had died at 19 yr