caa a22 4500 605455848 CHVBK 20210128100214.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s00167-013-2612-y doi (NATIONALLICENCE)springer-10.1007/s00167-013-2612-y Evaluation of the morphological variations of the meniscus: a cadaver study [Elektronische Daten] [Keinosuke Ryu, Takanori Iriuchishima, Midori Oshida, Akiyoshi Saito, Yuki Kato, Yasuaki Tokuhashi, Shin Aizawa] Purpose: The purpose of this study was to reveal the prevalence of the subtypes of the meniscus using human cadaver knees. Methods: Four hundred and thirty-seven cadaveric knees in 219 subjects (formalin fixed, Japanese population) with a median age of 83years (54-97) were included in this study. All soft tissues surrounding the knee, excluding the meniscus, were resected, and macroscopic assessment of the meniscus was performed. Meniscus subtypes were classified as: (1) normal meniscus, (2) complete discoid, (3) incomplete discoid, (4) ring-shaped, and (5) double-layered. Results: All subtypes of the meniscus were observed in the lateral meniscus. Complete discoid lateral meniscus was observed in 27 knees (6.2%), incomplete discoid lateral meniscus was observed in 139 knees (31.8%), ring-shaped lateral meniscus was observed in 4 knees (0.9%), and double-layered meniscus was observed in 2 knees (0.5%). Conclusion: This study reports the accurate prevalence of ring-shaped and double-layered meniscus. None of the subtypes were detected in the medial meniscus in this study. For clinical relevance, the results of this study can be useful in assisting the diagnosis of meniscus tear in clinical situations. Springer-Verlag Berlin Heidelberg, 2013 Anatomy nationallicence Meniscus nationallicence Morphology nationallicence Subtypes nationallicence Discoid nationallicence ACL : Anterior cruciate ligament nationallicence LM : Lateral meniscus nationallicence MM : Medial meniscus nationallicence Ryu Keinosuke Department of Orthopedic Surgery, Surugadai Nihon University Hospital, Chiyodaku Kanda Surugadai 1-8-13, Tokyo, Japan aut Iriuchishima Takanori Department of Orthopedic Surgery, Kamimoku Hotsprings Hospital, Minakami, Japan aut Oshida Midori Department of Orthopedic Surgery, Tokyo Teishin Hospital, Tokyo, Japan aut Saito Akiyoshi Department of Orthopedic Surgery, Surugadai Nihon University Hospital, Chiyodaku Kanda Surugadai 1-8-13, Tokyo, Japan aut Kato Yuki Department of Orthopedic Surgery, Nihon University School of Medicine, Tokyo, Japan aut Tokuhashi Yasuaki Department of Orthopedic Surgery, Nihon University School of Medicine, Tokyo, Japan aut Aizawa Shin Department of Functional Morphology, Nihon University School of Medicine, Tokyo, Japan aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/1(2015-01-01), 15-19 0942-2056 23:1<15 2015 23 167 https://doi.org/10.1007/s00167-013-2612-y text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00167-013-2612-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ryu Keinosuke Department of Orthopedic Surgery, Surugadai Nihon University Hospital, Chiyodaku Kanda Surugadai 1-8-13, Tokyo, Japan aut NATIONALLICENCE 700 1- Iriuchishima Takanori Department of Orthopedic Surgery, Kamimoku Hotsprings Hospital, Minakami, Japan aut NATIONALLICENCE 700 1- Oshida Midori Department of Orthopedic Surgery, Tokyo Teishin Hospital, Tokyo, Japan aut NATIONALLICENCE 700 1- Saito Akiyoshi Department of Orthopedic Surgery, Surugadai Nihon University Hospital, Chiyodaku Kanda Surugadai 1-8-13, Tokyo, Japan aut NATIONALLICENCE 700 1- Kato Yuki Department of Orthopedic Surgery, Nihon University School of Medicine, Tokyo, Japan aut NATIONALLICENCE 700 1- Tokuhashi Yasuaki Department of Orthopedic Surgery, Nihon University School of Medicine, Tokyo, Japan aut NATIONALLICENCE 700 1- Aizawa Shin Department of Functional Morphology, Nihon University School of Medicine, Tokyo, Japan aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/1(2015-01-01), 15-19 0942-2056 23:1<15 2015 23 167