History A young mother became concerned about her newborn child. The baby had general symptoms of fever, fatigue, irritability, and malaise without any history of trauma. Examination Close inspection of the left leg reveals some localized edema and erythema. On palpation, the baby appears to have pain overlying the proximal tibia. However, passive manipulation shows a full range of leg movement without any apparent indications of pain.
Investigations Initial investigations show markedly elevated C-reactive protein (CRP) levels. In addition, imaging studies of the knee show a periosteal elevation of the proximal tibial metaphysis (Cover image). What is your diagnosis for this baby, and what blood tests would be most helpful in diagnosing this baby's condition? (Answer is posted in the comment section below!) *This Case Challenge is from the Editorial Team of Docplexus and is meant for…
