Male, 4 years old. Evaluate for possible osteomyelitis. Right knee effusion. Puncture wound. MENISCI AND LIGAMENTS: The medial and lateral menisci are normal. The cruciate and collateral ligaments are normal.BONE AND MARROW: Bone marrow signal is normal.SYNOVIUM: Small joint effusion with synovial enhancementMUSCULATURE: Edema and enhancement involving the medial aspect of the vastus medialis indicates myositis.ADDITIONAL
1.Cellulitis involving the anteromedial subcutaneous soft tissues with a sinus tract from the skin to the deep soft tissues, and an associated subcentimeter collection, compatible with a small abscess.2.Inflammation extends to the medial aspect of the vastus medialis muscle, compatible with myositis.3.Small joint effusion and enhancing synovium indicating synovitis.4.No evidence of osteomyelitis.