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The Kager's fat pad radiological anatomy revised.

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This study mapped connections within Kager's fat pad using ankle MRI, revealing more structures than previously known. These connections converge at the posterior talus, enhancing anatomical understanding.

Keywords:
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Area of Science:

  • Anatomy
  • Radiology
  • Orthopedics

Background:

  • Kager's fat pad is crucial for ankle biomechanics.
  • Its detailed internal connections are not fully understood.
  • Accurate anatomical mapping is vital for surgical and diagnostic procedures.

Purpose of the Study:

  • To map the connections within Kager's fat pad.
  • To identify the specific anatomical structures that interface with the fat pad.
  • To construct a model illustrating these intra-fat pad connections.

Main Methods:

  • Retrospective analysis of 200 ankle magnetic resonance imaging (MRI) examinations.
  • Detailed examination of connections between Kager's fat pad and surrounding structures.
  • Construction of an anatomical model based on identified connections.

Main Results:

  • High-percentage connections were observed between the superior peroneal retinaculum and fibulotalocalcaneal ligament (85.5%), and the paratenon (82.5%).
  • The fibulotalocalcaneal ligament showed significant connections with the paratenon (medial 88.5%, lateral 68.5%) and flexor retinaculum (70%).
  • The posterior talocalcaneal ligament strongly connected with the flexor hallucis longus tunnel (76.5%) and fibulotalocalcaneal ligament (71%).

Conclusions:

  • Kager's fat pad contains more connections than previously documented.
  • All identified connections converge at the posterior process of the talus.
  • This detailed anatomical mapping refines understanding of ankle joint structures.