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331 Approach to Articular and Musculoskeletal Disorders
John J. Cush / Peter E. Lipsky

	Figure 331-1  Algorithm for the diagnosis of musculoskeletal complaints. An approach to formulating a differential diagnosis (shown in italics). CMC, carpometacarpal; CRP, C-reactive protein; DIP, distal interphalangeal; ESR, erythrocyte sedimentation rate; JA, juvenile arthritis; MCP,...
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	Figure 331-2  Algorithm for consideration of the most common musculoskeletal conditions. GC, gonococcal; IBD, inflammatory bowel disease.
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	Figure 331-3  Sites of hand or wrist involvement and their potential disease associations. CMC, carpometacarpal; DIP, distal interphalangeal; MCP, metacarpophalangeal; OA, osteoarthritis; PIP, proximal interphalangeal; RA, rheumatoid arthritis; SLE, systemic lupus erythematosus.
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	Figure 331-4  Origins of shoulder pain. The schematic diagram of the shoulder indicates with arrows the most common causes and locations of shoulder pain.
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	Figure 331-5  Origins of hip pain and dysesthesias. (From Cush et al, with permission.)
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	Figure 331-6  Algorithmic approach to the use and interpretation of synovial fluid aspiration and analysis. PMNs, polymorphonuclear (leukocytes); WBC, white blood cell (count).
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	Figure 331-7  [99mTc]Diphosphonate scintigraphy of the feet of a 33-year-old African-American male with reactive arthritis, manifested by sacroiliitis, urethritis, uveitis, asymmetric oligoarthritis, and enthesitis. This bone scan demonstrates increased uptake indicative of enthesitis involving...
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	Figure 331-8  Superior sensitivity of MRI in the diagnosis of osteonecrosis of the femoral head. A 45-year-old woman receiving highdose glucocorticoids developed right hip pain. Conventional x-rays (top) demonstrated only mild sclerosis of the right femoral head. T1-weighted...
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