Isolated Segond fracture in a pediatric patient

Abstract

Physicians diagnosing and managing knee injuries have become familiar with the lateral capsule sign, or Segond fracture on radiography. The Segond fracture is considered highly suggestive of an anterior cruciate ligament (ACL) tear in the adult population. This conclusion is not as well described in the pediatric patient. Recent anatomic studies have confirmed the presence of the anterolateral ligament (ALL), a structure described by Dr. Segond, and hypothesized to be the etiology of the lateral capsular avulsion. Although case reports of Segond fractures with an intact ACL in pediatric patients have been presented, there is usually a concomitant rotatory instability, tendinous injury, physeal fracture or posterolateral disruption. It is not currently clear the role that the ALL plays in the setting of Segond fracture with an intact ACL. We present a case of an isolated Segond fracture and briefly review the literature relating to this diagnosis. The literature suggests that a Segond fracture without an ACL tear is more common in the pediatric age group compared to adults. Our unique case is the presence of an isolated Segond fracture in a pediatric athlete.

Keywords :

• Lateral capsule sign
• Segond
• ACL tear
• anterolateral ligament

Declaration of interest

The authors have no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.

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