case_images: PMC6131294_01
case_images: Lateral radiograph at presentation showing inferior pole fragment.
case_images: 10.1177_2050313X18799242-fig1.jpg
case_images: PMC6131294_01_10.1177_2050313X18799242-fig1.jpg
case_images: fig1-2050313X18799242
case_images: His X-ray radiographs revealed an inferior pole fragment that was minimally displaced with clear sclerotic margins indicating a chronic underlying process (Figure 1).
case_images: Sagittal MRI depicting distal pole fragmentation and edema.
case_images: 10.1177_2050313X18799242-fig2.jpg
case_images: PMC6131294_01_10.1177_2050313X18799242-fig2.jpg
case_images: fig2-2050313X18799242
case_images: To rule out sleeve fracture, magnetic resonant imaging (MRI) was done and showed edema and joint effusion (Figure 2).
case_images: Four-week follow-up lateral radiograph showing complete ossification of the
  distal patella. Note asymptomatic radiographic feature of Osgood-Schlatter
  disease.
case_images: 10.1177_2050313X18799242-fig3.jpg
case_images: PMC6131294_01_10.1177_2050313X18799242-fig3.jpg
case_images: fig3-2050313X18799242
case_images: Four weeks after the injury, his radiographs showed complete osseous bridging and incorporation of the fragment (Figure 3).