Welcome to HCM
Read your prob, dermatomyositis
is diease of moscles n skin, inthis inflammation of muscles n skin occur. this is systemic autoimmune diease. steroid
n intraveous immunoglobins are treatment of choic. some time it associated with cancerous or precancereous stage so you should rule out it. no doubt its prognosis is poor but after giving steroid like prednisolon n immunoglobins patients may survive for long time.