This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Orthopaedics
Osgood-Schlatter's disease is seen in - 
Select and explain. 
A. Proximal tibia, B. Proximal femur, C. Distal tibia, D. Distal femur
A: Proximal tibia
Answer: A: Proximal tibia 
Explanation: Osgood-Schlatter disease (Tibial tubercle traumatic apophysis or Louise's knees disease) 

Osgood-Schlatter disease is osteochondritis of tibial tuberosity (a prominence located on the anterior aspect of the proximal/upper tibia).
The disease is most common in active boys aged 10-15. It most commonly occurs in just one leg but can occur in both at the same time.
The natural history is benign, with almost all cases asymptomatic by skeletal maturity.
Surgical excision of residual ossicle has been described with a good outcome.