Female 22 years old Reason: knee pain and instability There is a 1.5 cm faint nodular opacity in the subcutaneous fat medial to the proximal tibia. The knee otherwise appears normal. Sclerotic focus in the distal left femur likely represents a bone island.
Nonspecific nodular mass in the medial soft tissues of the knee better seen on recent MRI. Contrast enhanced MR of the knee, and/or referral to orthopedic oncology should be considered.