Radiologic Mimics of Osteomyelitis and Septic Arthritis: A Pictorial Essay

Figure 22

Calcific tendinitis in a 40-year-old female presenting with persistent shoulder pain. Axial PDFS (a) demonstrating marrow oedema signal in the humeral head at the greater tuberosity at teres minor tendon footprint. Sagittal PDFS (b) demonstrating corresponding cortical erosion. The MRI performed 5 months previously at the comparable plane (c) showed globular hypointense structure within the teres minor tendon footprint (arrow), confirming intraosseous migration of the calcific tendinitis in the most recent images. AP radiograph of the right shoulder (d) performed at the time of initial presentation also demonstrated calcium deposition in rotator cuff tendons. The calcium deposit is not well appreciated in the more recent study given the acute resorptive phase.

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