PMC6588135_01
Pre-operative X-rays.(a): Left hip AP. Note that left hip shows osteoporotic changes. (b): Left hip lateral X-ray.
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F1
The anterior-posterior and lateral X-ray of the hips were taken(Fig. 1).
(a-c)Pre-operative left hip non-contrast magnetic resonance imaging shows the high intensity of the femoral head in the T2-weighted image.
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F2
MRI shows increased intensity on T2-weighted images (Fig. 2).
(a and b)Intraoperative core decompression procedure under fluoroscopy.
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F3
An 8 mm drill was used for decompression targeting femoral head (Fig. 3).
Hemorrhagic necrosis between bone trabeculae.
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F4
The results of the per-operative samples came out as "marrow parenchyma including fields of necrosis" and "hemorrhagic necrosis between bone trabeculae" (Fig. 4).
Post-operative hip X-ray at postoperative 2 years.
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F5
X-ray has no specific changes (Fig. 5), and MRI shows a decreasing of the intensity of edema (Fig. 6).