PMC5350332_01
PMC5350332_02
AP pelvis X-ray showing avascular changes of subchondral cystic lucency without evidence of femoral head collapse.
CRIPE2017-6969787.001.jpg
PMC5350332_02_CRIPE2017-6969787.001.jpg
fig1
Pelvic radiographs (AP and frog lateral in Figures 1 and 2) were reviewed and showed avascular changes to the femoral head with the characteristic "crescent sign" of osteonecrosis, a subchondral lucency, in the femoral epiphysis.
Frog leg lateral X-ray of bilateral hips again showing avascular changes with characteristic "crescent sign" of osteonecrosis to right femoral head.
CRIPE2017-6969787.002.jpg
PMC5350332_02_CRIPE2017-6969787.002.jpg
fig2
Pelvic radiographs (AP and frog lateral in Figures 1 and 2) were reviewed and showed avascular changes to the femoral head with the characteristic "crescent sign" of osteonecrosis, a subchondral lucency, in the femoral epiphysis.
AP pelvis X-ray obtained 6 weeks from initial presentation which shows early femoral head collapse.
CRIPE2017-6969787.003.jpg
PMC5350332_02_CRIPE2017-6969787.003.jpg
fig3
These repeat images (Figures 3 and 4) show the continued progression of the pathology, with sequential flattening of the femoral head as is expected in osteonecrosis.
AP pelvis X-ray obtained 12 weeks from initial presentation with progressive flattening of femoral epiphysis indicative of segmental collapse seen in non-Perthes osteonecrosis.
CRIPE2017-6969787.004.jpg
PMC5350332_02_CRIPE2017-6969787.004.jpg
fig4
These repeat images (Figures 3 and 4) show the continued progression of the pathology, with sequential flattening of the femoral head as is expected in osteonecrosis.