[Complete Rupture of the Extensor Hallucis Longus Tendon with Accessory Slip Mimicking a Partial Rupture: A Case...

Area of Science:

• Anatomy
• Orthopedics
• Medical Imaging

Background:

• The extensor hallucis longus (EHL) tendon is crucial for foot dorsiflexion.
• Anatomical variations, such as the accessory tendon of the EHL, are relatively common.
• Tendon injuries can significantly impact mobility and require precise diagnosis.

Observation:

• A 38-year-old female presented with symptoms suggestive of a partial EHL tendon rupture.
• Initial conservative treatment was considered for the suspected injury.
• Magnetic Resonance Imaging (MRI) revealed a complete rupture of both the main EHL tendon and its accessory tendon.

Findings:

• The patient was diagnosed with a complete rupture of the main EHL tendon.
• A coexisting complete rupture of the accessory EHL tendon, located medial to the main tendon, was identified.
• The MRI findings necessitated a surgical intervention over conservative management.

Implications:

• Accurate diagnosis of EHL tendon ruptures, including variations, is critical for appropriate treatment planning.
• Surgical intervention may be required for complete ruptures involving both main and accessory tendons.
• Understanding EHL tendon anatomy and variations aids in managing foot and ankle injuries effectively.