Table 166.2Differential Diagnosis of Joint Fluid Groups

Group I (noninflammatory)Group II (inflammatory)Group III (septic)Group IV (hemorrhagic)
OsteoarthritisRheumatoid arthritisBacterial infectionTrauma
TraumaCrystal synovitisRheumatoid arthritisCoagulation defect
Avascular necrosisSpondyloarthropathyCrystal synovitisTumor
Systemic lupusReactive arthritisPigmented villonodular synovitis
Acute rheumatic feverConnective tissue disorders
Endocrine arthropathyAcute rheumatic fever
Juvenile arthritis
Viral infection
Fungal infection
Bacterial infection

From: Chapter 166, Joint Fluid

Cover of Clinical Methods
Clinical Methods: The History, Physical, and Laboratory Examinations. 3rd edition.
Walker HK, Hall WD, Hurst JW, editors.
Boston: Butterworths; 1990.
Copyright © 1990, Butterworth Publishers, a division of Reed Publishing.

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