The double ACL sign: an unusual bucket-handle tear of medial meniscus |
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Authors: | Koji Takayama Takehiko Matsushita Tomoyuki Matsumoto Seiji Kubo Masahiro Kurosaka Ryosuke Kuroda |
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Institution: | (1) Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan; |
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Abstract: | Several characteristic magnetic resonance imaging (MRI) signs of meniscal bucket-handle tears are well known and widely used.
This case report presents a new MRI sign of a meniscal bucket-handle tear. A 17-year-old boy visited our hospital because
of the pain in his left knee. Preoperative MRI on sagittal view showed a tear in the anterior horn of the medial meniscus
and a displaced fragment of the medial meniscus in front of the original anterior cruciate ligament (ACL), which looks like
another ACL. Under arthroscopic examination, the bucket-handle medial meniscus displaced parallel to the ACL was observed.
A longitudinal tear was extended from the anterior horn to the posterior horn of medial meniscus. To our knowledge, this new
MRI sign of bucket-handle tear, “the double ACL sign”, has not been previously reported. Level of evidence V. |
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