Toddler with a limp

Radiograph of osteomyelitis with Brodie's abscess
AP radiograph of the knee at presentation (upper left) shows lucent lesions of the metaphysis and epiphysis which show some interval healing on a followup AP radiograph of the knee taken 2 months later (upper right). The patient was lost to followup and did not complete antibiotic therapy and returned to clinic 2 years later and the AP radiograph at that time (lower left) shows a lucent sinus tract extending from the epiphysis to the metaphysis that persists on the next AP radiograph of the knee obtained 1 year later (lower right).

The diagnosis was beyond neonatal to 18 months osteomyelitis with a Brodie abscess.