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Using MR imaging to differentiate peroneal splits from other peroneal disorders
M E Schweitzer1, M E Eid, D Deely
1Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, PA 19107, USA.
AJR. American Journal of Roentgenology
|January 1, 1997
Summary
Magnetic resonance imaging can identify peroneal splits syndrome by detecting a bisected peroneus brevis tendon, a flat or convex fibular groove, and a posterolateral fibular spur. This helps differentiate it from other peroneal tendon disorders.
Area of Science:
- Orthopedics
- Radiology
- Sports Medicine
Background:
- Peroneal splits syndrome involves longitudinal tears of the peroneus brevis tendon, often due to repetitive subluxations.
- Accurate diagnosis is crucial for effective treatment of peroneal tendon disorders.
Purpose of the Study:
- To utilize MR imaging to distinguish the specific characteristics of peroneal splits syndrome from other peroneal tendon pathologies.
Main Methods:
- MR imaging (1.5-T) was performed on 42 ankles in 39 patients with clinically diagnosed peroneal tendon disorders.
- Two blinded observers assessed tendon morphology, intratendon signal intensity, sheath fluid, fibular groove shape, fibular margin, and subluxation.
- Surgical correlation was used to confirm diagnoses.
Main Results:
- Peroneal splits were confirmed surgically in 20 ankles.
- Key MR findings included a bisected peroneus brevis tendon (p < .0001), convex/flat fibular groove (p = .03), and fibular spur (p = .002).
- Increased sheath fluid (55%) and intratendon signal (60%) were less specific indicators.
Conclusions:
- Peroneal splits syndrome is frequently associated with a bisected peroneus brevis tendon.
- A convex or flat fibular groove and a posterolateral fibular spur are characteristic MR findings.
- MR imaging aids in differentiating peroneal splits syndrome from other peroneal disorders.