Diagnostic Approach for a 17-Year-Old Female with Fatigue and Joint Pain

Initial Diagnostic Workup

• The American College of Radiology recommends plain radiographs of the affected joints as the first imaging study to evaluate for structural abnormalities, early signs of arthritis, or other pathology 1, 2

Differential Diagnosis Considerations

Inflammatory Arthritis

• The American College of Radiology suggests considering juvenile idiopathic arthritis or early-onset rheumatoid arthritis, particularly if multiple joints are involved with morning stiffness lasting more than 30 minutes 1
• The European League Against Rheumatism recommends considering Sjögren's syndrome, especially if there are associated symptoms like dry eyes or dry mouth 3

Advanced Imaging

• The American College of Radiology recommends MRI without contrast of the affected joints if radiographs are normal or show minimal changes but symptoms persist 4, 6
• MRI can detect early inflammatory changes, bone marrow edema, and soft tissue abnormalities not visible on plain radiographs 4, 6

Special Considerations

• The British Society of Sports Medicine recommends specific radiographic views for suspected hip-related pain, including AP pelvic and lateral femoral head-neck views 7
• The European League Against Rheumatism recommends weight-bearing and patellofemoral views for optimal detection of abnormalities if knee pain is present 8

Important Diagnostic Pitfalls

• Up to 41% of osteochondral abnormalities can be missed on radiography, according to the American College of Radiology 2
• Fatigue and joint pain may represent early manifestations of systemic autoimmune diseases that require prompt diagnosis and management, as suggested by the European League Against Rheumatism 3

Follow-up Recommendations

• Repeat imaging may be necessary if symptoms progress or change in character, according to the European League Against Rheumatism 8
• Diagnostic joint aspiration under ultrasound guidance may be considered for persistent effusions to evaluate for crystals or infection, as recommended by the American College of Radiology 1, 6