SAEM Clinical Images Series: A Painful Swollen Digit

Although fundamentally a clinical diagnosis, the initial evaluation for infectious flexor tenosynovitis should include laboratory studies including complete blood count (CBC) and inflammatory markers (ESR/CRP). Radiographs may be performed to evaluate for occult traumatic injury or foreign body. Treatment includes emergent consultation of orthopedics or hand surgery, initiation of intravenous (IV) antibiotics, and hospital admission. Antibiotics should target gram-positive organisms (Staphylococcus, including MRSA, and Streptococcus). In immunocompromised patients, additional coverage against gram-negative organisms and anaerobes may be needed. Risk factors for poor outcomes include immunocompromise (HIV, diabetes, immunosuppression), intravenous drug use, peripheral vascular disease, and polymicrobial infection.

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