Magnetic Resonance Imaging📍 Hip更新于 2025-12-15影像科审核
Avascular Necrosis of the Femoral Head
了解 Hip Magnetic Resonance Imaging 影像中的 Avascular Necrosis of the Femoral Head，明确其含义与下一步措施。
影像表现
Magnetic Resonance Imaging FindingSubchondral serpiginous low-signal rim with inner high-signal on T2 (double-line sign); marrow edema early.
临床意义
Progressive collapse risk; early detection guides offloading and surgical planning.
What is AVN?
Bone death from disrupted blood supply, often steroid or alcohol related. MRI is most sensitive early.
Imaging Appearance
- Double-line sign on T2
- Subchondral crescent indicates impending collapse
- Marrow edema in symptomatic phases
Clinical Significance
- Predicts structural collapse; hip preservation possible if caught early
- Guides need for core decompression vs arthroplasty
Symptoms
- Groin or buttock pain, worse with weight bearing
Diagnosis
- MRI hip without contrast
- Consider bilateral imaging (often bilateral)
Treatment
- Offload, bisphosphonates (evidence mixed)
- Core decompression, osteotomy, or arthroplasty depending on stage
Prognosis
- Early-stage managed better; collapse leads to arthritis
What Should You Do?
- Limit weight-bearing per orthopedic advice.
- Address risk factors (steroids, alcohol).
- Follow imaging surveillance for stage progression.
Medical Disclaimer: Educational only; follow orthopedic guidance.
搭配化验结果解读
当影像出现 Avascular Necrosis of the Femoral Head 时，医生常会查看这些化验：
相关影像术语
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