MR imaging of meniscal malformations of the knee mimicking displaced bucket-handle tear.
We report two cases of patients with lateral meniscal malformations of the knee that were found incidentally. Magnetic resonance imaging (MRI) of both cases showed a fragment-like meniscus structure located in the intercondylar notch, very similar to the "fragment in the intercondylar notch sign" observed in displaced bucket-handle tear. Arthroscopic examinations revealed a ring-shaped lateral meniscus in one case, and "flipped-over" lateral meniscus in the other. In the latter, a similar lateral meniscal malformation was observed contralaterally at MR arthrography.
Fujikawa
Akira
A
Department of Radiology, Japan Self-Defense Forces Central Hospital, 1-2-24, Ikejiri, Setagaya, Tokyo 154-8532, Japan. akfujikawa@aol.com
Amma
Hisayoshi
H
Ukegawa
Yoh
Y
Tamura
Taiji
T
Naoi
Yutaka
Y
D000328:Adult; D003937:Diagnosis, Differential; D006801:Humans; D007718:Knee Injuries / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D008297:Male; D008592:Menisci, Tibial / Q000002:abnormalities* / Q000473:pathology