Lab tests to differente causes of joint pain

Lab tests to differente causes of joint pain

Which laboratory tests are helpful in differentiating causes of joint pain

Laboratory and Imaging Evaluations to Help Differentiate Causes of Joint PainAdapted from Cassidy JE et al: Textbook of pediatric rheumatology, ed 6, Philadelphia 2011, WB Saunders.

TestConditions in which Test may be Helpful
Complete blood count, differential, plateletsLeukemia (if blasts on smear)
Infections in bones, joints, muscles
Systemic connective tissue diseases
Sedimentation rateInfections
Systemic connective tissue diseases
Inflammatory bowel disease
RadiographsAll bone tumors, malignant and benign
Osteomyelitis (chronic)
Discitis (late)
Slipped capital femoral epiphysis
Legg–Calvé–Perthes disease
Leukemia (leukemic lines on x-ray)
Bone scanOsteomyelitis (acute and chronic)
Osteoid osteoma
Malignancies (leukemia, bone tumors, and metastases)
Infarction of bone
Complex regional pain syndrome
Muscle enzymesInflammatory muscle disease
Muscular dystrophy

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