What are the recommended referral criteria for a patient suspected of having dermatomyositis?

The provided UK guideline context does not contain specific recommended referral criteria for a patient suspected of having dermatomyositis ¹,²,³,⁴,⁵. The guidelines cover referral criteria for conditions such as psoriatic arthritis ¹,³, spondyloarthritis ³, rheumatoid arthritis ⁴, and various suspected cancers ⁵, but dermatomyositis is not mentioned within the provided documents.