Medial Discoid Meniscus: A Rare Case Report.

The meniscus is a glossy white structure found in the knee between the femoral condyle and tibial plateau in the medial and lateral aspects of both knees. The main purposes of the meniscus are to enhance joint congruity and stability, transmit load, and absorb stress. A rare type of anomaly of the meniscus shape is called discoid meniscus, which presents as an atypical shape also known as disk cartilage. This report presents a 13-year-old male with a history of left knee pain after a fall. The pain was stabby in nature with a decrease in range of motion in the left knee and positive McMurray and Apley's tests on examination. The patient was treated by arthroscopic saucerization, and the procedure was successful. The patient had a good postoperative outcome after two months of follow-up.

Discoid medial meniscus of both knees: A case report.

BACKGROUND: Discoid meniscus is a congenital anomaly that typically affects the lateral meniscus. The appearance of the discoid medial meniscus in both knees is extremely rare, with an incidence of only 0.012%. CASE SUMMARY: Our patient was a 30-year-old female. Under no obvious predisposing causes, she began to experience pain in both knees, which worsened while walking and squatting. The pain was aggravated after exercise, and joint flexion and extension activities were accompanied by knee snapping. Apley's test was positive on physical examination, and there was a pressing pain in the medial articular space. Plain radiographs of both knees revealed no obvious abnormalities in the bilateral knee joint space. Partial meniscectomy as well as menisci reformation were performed on both knees under arthroscopy. Under the guidance of rehabilitation, the patient's range of motion in both knees returned to normal without pain and knee snapping. CONCLUSION: This study showed that the clinical manifestations of the discoid medial meniscus injury are identical to those of the conventional medial meniscus injury, and arthroscopic surgery is effective.

Ipsilateral Medial and Lateral Discoid Menisci: A Rare Combination of Infrequent Anatomic Variants.

A discoid meniscus is a thick, disk-shaped meniscus which is prone to tearing, degeneration, and loss of stability in the knee. A discoid meniscus most commonly affects the lateral meniscus, rarely the medial meniscus. Here, we present a case of an extremely rare medial and lateral discoid meniscus in the ipsilateral knee of a 10-year-old male. Ipsilateral medial and discoid menisci are incredibly rare and one must keep this entity in mind to avoid confusion while interpreting knee magnetic resonance imaging.

Menisco discoideo medial sintomático / Symptomatic medial discoid meniscus

A discoid meniscus is shaped like a disc and has a thicker cut section, compared with that of the normal semilunar meniscus. Lateral discoid meniscus are very rare, while the medial equivalent is extremely rare. We report two patients with a symptomatic torn medial discoid meniscus. Both patients were successfully treated with arthroscopic partial resection. Only one of the patients had a certified unilateral disease, because he underwent contralateral knee arthroscopy previously, for a meniscal tear in a normally shaped medial meniscus. A review of the available literature regarding this condition is also presented.

Un menisco discoideo presenta grosor aumentado y forma de disco, en lugar de la configuración semilunar normal. Su variante lateral es poco frecuente, siendo aún más inhabitual el compromiso del menisco medial. Se presentan dos pacientes con lesión sintomática de menisco discoideo medial. Ambos pacientes fueron tratados exitosamente mediante resección parcial artroscópica. En sólo uno de los pacientes se descartó patología bilateral, ya que éste había sido sometido previamente a artroscopia de rodilla contralateral por lesión meniscal medial en menisco de configuración normal. Se presenta además una revisión de la literatura disponible acerca de esta patología.

Discoid Medial Meniscus: 2 Case Reports / 대한정형외과학회잡지

The vast majority of discoid menisci are lateral. A medial discoid meniscus is very rare. A 33-year-old and a 15-year-old male patient were diagnosed as having a complete medial discoid meniscus by means of magnetic resonance imaging and arthroscopic procedures. The first patient had a peripheral tear along with cystic degeneration, and the second had a horizontal tear. One was treated successfully by an arthroscopic partial meniscectomy with a peripheral repair, and the other by an arthroscopic partial meniscectomy. We report two cases of medial discoid meniscus with a brief review of literature.

Anomalous Insertion of Anterior Horn of Discoid Medial Meniscus

Lateral discoid meniscus is a common cause of internal derangement of the knee joint. The discoid medial meniscus is much less common than the discoid lateral meniscus. Anomalous insertion of the anterior horn of the medial meniscus is extremely rare. The authors performed arthroscopy on the symp-tomatic knee joint and incidentally found an anomalous insertion of the anterior horn of the medial menis-cus into the anterior cruciate ligament combined with incomplete discoid medial meniscus. We treated discoid medial meniscus by reshaping but anomalous insertion of the medial meniscus into anterior cruiate ligament was left alone. On the 13 months follow-up after surgery, the result was satisfactory.