Muscle Disease Flashcards
How do muscle diseases present
Muscle pain (myalgia) Muscle weakness/tiredness Wasting if prolonged No stiffness Abnormal blood tests
Name 2 inflammatory myopathies
Polymyositis
Dermatomyositis
Which sex is inflammatory myopathy more common in
Women
What age has the peak incidence of inflammatory myopathy
40-50
How does inflammatory myopathy present histologically
Muscle fibre necrosis
Degeneration
Regeneration
Inflammatory cell infiltrate.
List the cutaneous signs of dermatomyositis
Gottron’s sign - papules on finger joints
Heliotrope rash - around eye
Shawl sign - rash across the back of shoulders
What organ systems can be involved in inflammatory myopathy
Lungs = ILD and muscle weakness Oesophagus = dysphagia Heart = myocarditis
Which cancers are associated with inflammatory myopathy
Ovarian, breast, stomach, lung, bladder and colon
What symptoms do people with inflammatory myopathies present with
Tired muscles Functional difficulty Muscle pain Weight loss Cough &/or SOB Raynaud's
Which drugs might be associated with inflammatory myopathy
Steroids
Statins
Which social factors might be associated with inflammatory myopathy
Alcohol
Illicit drug use
What signs of inflammatory myopathy would show up on electromyography
Increased fibrillations
Abnormal motor potentials
Complex repetitive discharges
Which age group does polymyalgia rheumatica occur in
Almost exclusively in the over 50s
Typically present 60-70
Symptoms of polymyalgia are usually symmetrical - true or false
True
Get bilateral shoulder and hip pain
Which areas are usually affected by polymyalgia rheumatica
Pain in shoulder and hip girdle - bilateral
Reduced movement in shoulders neck and hips due to joint issue