Which laboratory tests would be appropriate to order for a patient with suspected transient synovitis?

Ordering a complete blood count (CBC), blood culture, and C-reactive protein (CRP) is appropriate for a patient with suspected transient synovitis. A CBC helps evaluate the overall health of the patient and can identify signs of infection or inflammation by assessing white blood cell counts. A blood culture is vital in ruling out a more serious infection, such as septic arthritis, which can present similarly. The CRP test measures the level of inflammation in the body and provides additional information about whether an inflammatory process, such as transient synovitis, is present.

While other options include relevant tests or imaging for differential diagnoses, they may not specifically address the immediate evaluation and management of transient synovitis as effectively as the chosen tests do. For example, imaging studies like X-rays and MRI might be used later to evaluate other potential issues such as fractures or abnormalities in the joint. Similarly, throat cultures are more relevant in cases of suspected streptococcal infections rather than joint conditions.