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MR Vol.14 No.2 indexに戻る
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MODERN RHEUMATOLOGY
Vol.14 No.2 |
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Discoid lateral menisci in Japanese cadaver knees
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| Yuki Kato1 , Midori Oshida2, Shin Aizawa3, Akiyoshi
Saito1 and Junnosuke Ryu1 |
(1) Department of Orthopedic Surgery, Nihon
University School of Medicine, 30-1 Oyaguchi-Kami-machi, Itabashi-ku,
Tokyo, 173-8610, Japan
(2) Department of Orthopaedic Surgery, Tokyo Teishin Hospital, Tokyo, Japan
(3) Department of Anatomy, Nihon University School of Medicine, Tokyo, Japan |
Received: 14 October 2003 Accepted: 10 November
2003 |
| Abstract |
| We undertook a descriptive, observational study
to determine the prevalence of the discoid lateral menisci. The relation
between the lateral meniscal shapes and the incidence of meniscal
tears were studied, and the gender differences in discoid lateral
menisci and the similarities of the lateral meniscal shapes in bilateral
knees were examined. A total of 602 knees from 306 cadavers were
macroscopically analyzed. Altogether, 577 lateral menisci were classified
into the following three types: normal type (NM); incomplete discoid
type (ICDM); and complete discoid type (CDM). Each lateral meniscus
was examined for meniscal tears. The prevalence of a discoid lateral
meniscus and gender differences in its prevalence were examined,
as were the presence of a meniscal tear for the three types of lateral
meniscus. In all, there were 21 (3. 6%) CDM cases and 171 ICDM cases
(29.6%). The prevalence of discoid lateral meniscus, including ICDM
and CDM, in the female cadavers was significantly higher than that
in the male cadavers, but there was no significant gender difference
in the prevalence of CDM. It was found that the shape of the lateral
meniscus was similar bilaterally. The incidence of meniscal tears
for ICDM was significantly higher than that for NM. |
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| Key words |
| Bilateral knees - Cadaver - Discoid lateral
meniscus - Japanese - Meniscal tear |
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