- Unhappy triad
Infobox_Disease
Name = Unhappy triad
Caption = Knee
DiseasesDB =
ICD10 = ICD10|S|83|7|s|80
ICD9 =
ICDO =
OMIM =
MedlinePlus =
eMedicineSubj =
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An unhappy triad (or terrible triad, or O'Donoghue's triadcite journal |author=Shelbourne K, Nitz P |title=The O'Donoghue triad revisited. Combined knee injuries involving anterior cruciate and medial collateral ligament tears |journal=Am J Sports Med |volume=19 |issue=5 |pages=474–7 |year= 1991 |pmid=1962712 |doi=10.1177/036354659101900509] ) is an injury to theknee . It commonly occurs in contact sports (such asAmerican football ). The mechanism for this injury occurs when a lateral (outside) force to the knee is received while the foot is fixed on the ground in external rotation.tructures in triad
This scenario causes an injury to three knee structures:
* the
anterior cruciate ligament
* themedial collateral ligament (or "tibial collateral ligament")
* themedial meniscus The inclusion of the lateral meniscus in the triad has been recently ascertained as it previously had been incorrectly postulated that the medial meniscus was the third component.cite journal |author=Barber F |title=What is the terrible triad? |journal=Arthroscopy |volume=8 |issue=1 |pages=19–22 |year=1992 |pmid=1550645]
Terminology
The term "terrible triad" is also sometimes used in the popular press to describe conditions relating to pain, or even to refer to the
MacDonald triad of sociopathic behavior.ee also
*
Anterior cruciate ligament injury
*Anterior cruciate ligament reconstruction
=AdditionalReferences
External links
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