Table 1

 Conditions that might mimic polymyalgia rheumatica and investigations stipulated to exclude them

Mimicking conditionInvestigations to exclude
ANF, antinuclear factor; CPK, creatine phosphokinase.
Rheumatoid arthritisRheumatoid factor, x ray of hands, possibly feet, and any other affected joint
Capsulitis of shoulderFull examination of shoulder with clinical history
Cervical spondylosisClinical history, x ray of cervical spine
Osteoarthritis of shoulderShoulder x ray
PolymyositisCPK, electromyography where clinically indicated
ThyrotoxicosisThyroid function tests
MyopathiesClinical examination, compatible electromyography
Systemic lupus erythematosusANF, DNA binding
Polyarteritis nodosaClinical picture
DermatomyositisClinical picture, CPK
Multiple myelomaSerum and urine electrophoresis
NeoplasmCareful clinical history, chest x ray, occult blood
Parkinson’s diseaseClinical history and clinical signs
Subacute bacterial endocarditisHeart murmurs, blood cultures