- Traction apophysitis of patellar ligament insertion on tibial tubercle (Usually due to trauma)
- Repetitive microtrauma during phase of skeletal maturation of tibial tubercle (Rapid growth rate during adolescent)
- Repetitive microtrauma during phase of skeletal maturation of tibial tubercle (Rapid growth rate during adolescent)
- Painful swelling, palpable mass
- Bilaterality, 25-50%
- Swollen soft tissue anterior to tibial tuberosity, avulsed ossific fragments ➜ Increased or fused fragmentations
- Radiograph
- Ossification & thickening inferior patellar tendon adjacent to tibial tubercle
- Irregular, fragmented ossification of tibial tubercle
- Adjacent soft tissue swelling
- Fragmentation remains following resolution of clinical symptoms; no associated swelling
- MR and US : Patellar tendinitis, deep infrapatellar bursitis
Right) Deep infrapatellar bursitis with adjacent soft tissue edema
