Ortho Dx: Radiolucent lesion on the proximal tibia

A patient, aged 16 years, presented to the office with anterior medical knee pain after being hit during a hockey game. The patient denied any prior knee pain before this injury.

On exam of the knee, a subtle laxity with valgus stress consistent with a medial ligament (MLC) sprain was found. The rest of the exam was unremarkable.

When reviewing ...