Acta Med. 2010, 53: 247-249

An 11-Year-Old Girl Presenting with Chronic Knee Pain: A Case Report with Diagnostic Dilemma

Muhammad Kamal Maja, Abdul Halim Ara, Syed A. Faisala, Johan Ahmada, Srijit Dasb

aUniversity Kebangsaan Malaysia Medical Centre, Faculty of Medicine, Department of Orthopaedic and Traumatology, Kuala Lumpur, Malaysia
bUniversity Kebangsaan Malaysia Medical Centre, Faculty of Medicine, Department of Anatomy, Kuala Lumpur, Malaysia

Received September 18, 2009
Accepted October 22, 2010

Discoid meniscus is the commonest anatomical aberration of the knee joint, among rare cases such as bilateral separated lateral meniscus, accessory lateral meniscus, partial deficiency of the lateral meniscus and double-layered lateral meniscus. An 11-year- old girl presented with history of chronic pain in her right knee for the last 6 months. The problem disturbed her involvement in the sport activities at school. Clinical examination revealed a clicking sensation on knee extension with lateral joint line tenderness. Magnetic resonance imaging (MRI) of her right knee showed torn posterior horn of lateral meniscus. Arthroscopy examination revealed a discoid meniscus with absence posterior horn. Posterior horn deficient discoid meniscus is a rare form of a congenital meniscus anomaly. We as clinicians believe that the abnormal shaped meniscus may pose a diagnostic challenge clinically and radiologically. Presentation of this case may be beneficial for orthopaedicians in their daily clinical practice.


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