Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Sports Medicine - Ankle / Foot
Abstract number: 25457
FUNCTION OF CALCANEOFIBULAR LIGAMENT IN PERONEAL TENDON
DISLOCATION
Yasushi SHINOHARA, Tsukasa KUMAI, Ichiro HIGASHIYAMA, Takenori MATSUDA,
Yasuhito TANAKA
Nara Medical University, Kashihara, Nara (JAPAN)
PURPOSE: The peroneal tendon dislocation combines with the ankle sprain is
controversial on its mechanism and surgical treatment. The calcaneofibular ligament
(CFL) is a part of the lateral ankle ligament complex and makes up the floor of the
peroneal sheath. However, there are no detailed reports on the CFL in the peroneal
tendon dislocation. The purpose is to assess the histological structure of the CFL and
clarify its function. MATERIAL AND METHODS: Eight CFLs contained both
attachments were removed from dissecting room cadavers. They were sectioned and
strained with alcian blue, haematoxylin and eosin, Masson’s trichrome, toluidine blue.
RESULTS: The fibular attachment was more fibrocartilaginous than the calcaneal
one. Many histopathologies were also found at its fibular insertion (multiple
tidemarks, cartilage cell clusters and destructions of subchondral plate). The collagen
fibers at the fibular attachment entered in a perpendicular direction, while they at the
calcaneal one did in parallel. The CFL was crossed by and comes into contact with
the peroneal tendon at the malleolar groove. The fibrocartilage layer presented at the
site where ligament contact the tendon. DISCUSSION AND CONCLUSION: Our
results showed the fibular attachment is more vulnerable to injury. It suggests an
avulsion fracture frequently occurs at its fibular attachment. The relations between
the CFL and the peroneal tendon lead to another function of the CFL works as a
base over which the peroneal tendon glides. Moreover, it may facilitate to explain the
mechanism by which peroneal tendon dislocation occurs.
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