Differential Diagnosis
- Single most likely diagnosis
- Septic elbow (infectious arthritis): Given the history of trauma (fall), followed by swelling, redness, and clear liquid discharge, along with the recent antibiotic treatment (Amoxi-Clav), this diagnosis is highly plausible. The symptoms suggest an infection within the elbow joint, which could have been introduced at the time of the fall or subsequently.
- Other Likely diagnoses
- Olecranon bursitis: This condition, characterized by inflammation of the bursa at the elbow, could explain the swelling and redness. The clear liquid discharge might be consistent with a non-septic bursitis, especially if the fluid is not purulent.
- Traumatic synovitis: The fall could have caused an inflammatory response within the elbow joint, leading to synovitis. This condition might present with swelling and possibly some fluid accumulation but typically would not have significant redness or purulent discharge.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Osteomyelitis: Although less likely given the presentation, osteomyelitis (bone infection) is a serious condition that requires prompt diagnosis and treatment. It could be a complication of the initial trauma and subsequent infection.
- Septicemia or systemic infection: If the infection at the elbow site has spread systemically, it could lead to septicemia, a life-threatening condition. Monitoring for systemic signs of infection (fever, chills, etc.) is crucial.
- Rare diagnoses
- Gout or pseudogout: These conditions involve the deposition of crystals within the joints and can cause sudden onset of swelling and redness. However, they are less likely given the history of trauma and the clear liquid discharge.
- Hemarthrosis: If the fall caused significant internal bleeding within the joint, this could lead to hemarthrosis. The presence of clear liquid discharge might not typically be seen in hemarthrosis, as the fluid would likely be bloody.