Hip pain in three children accompanied by transient abnormal findings on MR images

Area of Science:

• Pediatric Radiology
• Musculoskeletal Imaging
• Bone Marrow Pathology

Background:

• Hip pain in children can be challenging to diagnose.
• Magnetic resonance (MR) imaging is a key tool for evaluating hip pain.
• Differentiating transient bone marrow edema from avascular necrosis is crucial for appropriate management.

Observation:

• Three pediatric patients presented with hip pain and abnormal T1-weighted MR imaging signals in the femoral head.
• Initial T2-weighted MR images showed isointense signals at the affected sites.
• Follow-up MR imaging demonstrated resolution of the low-signal-intensity patterns on T1-weighted images and persistent isointense signals on T2-weighted images.

Findings:

• The observed MR imaging changes resolved concurrently with clinical improvement in all patients.
• These findings are consistent with transient bone marrow edema.
• MR imaging demonstrated high sensitivity in detecting marrow-based pathological processes.

Implications:

• Transient bone marrow edema should be considered in the differential diagnosis of pediatric hip pain.
• MR imaging findings may indicate a self-limiting condition rather than avascular necrosis.
• Conservative management strategies may be appropriate for pediatric patients with MR imaging findings suggestive of transient bone marrow edema.