Last updated: Saturday, 27, November, 2010
Key InformationAppropriate Tests

The diagnosis is based on clinical features (including proximal muscle weakness and rash), diagnostic imaging (soft tissue calcification), electrophysiological findings, elevated creatine kinase and the histology of skin and muscle biopsy.

Antinuclear antibodies, extractable nuclear antibodies, Jo-1 antibodies.

In adults, occult malignancy should be considered.

See Poliomyelitis