Revisiting the Extensor Hallucis Longus Tendon: Anatomical Classification and Orthopedic Implications

Area of Science:

• Orthopedic Surgery
• Anatomy
• Radiology

Background:

• Anatomical variations of the extensor hallucis longus (EHL) tendon are not well-documented in orthopedic literature.
• Accurate identification of EHL tendon variants is vital for preventing surgical complications and improving patient outcomes.
• Understanding EHL tendon morphology is crucial for successful foot and ankle procedures.

Purpose of the Study:

• To review current knowledge on EHL tendon anatomy and morphology.
• To focus on the Olewnik classification system for EHL tendon variations.
• To highlight the diagnostic, radiological, and surgical significance of EHL tendon variants.

Main Methods:

• A comprehensive literature review was performed.
• Included studies encompassed cadaveric dissections, imaging studies, and clinical observations.
• The Olewnik classification system served as the framework for analysis.

Main Results:

• The Olewnik classification identifies three main types of EHL tendon variations (Type I, II, and III).
• Each type presents unique anatomical features, diagnostic challenges (MRI, ultrasound), and surgical implications.
• The Olewnik system demonstrates superior clinical utility compared to previous classifications.

Conclusions:

• The Olewnik classification provides a reliable, imaging-friendly, and surgically relevant method for assessing EHL tendon variability.
• Integrating this classification into preoperative planning can enhance surgical safety and accuracy.
• Further clinical validation and integration into surgical education are recommended.