Saucerization of complete discoid lateral meniscus is associated with change of morphology of the lateral femoral condyle and tibial plateau

Takuya Kinoshita; Yusuke Hashimoto; Kazuya Nishino; Ken Iida; Hiroaki Nakamura

doi:10.1007/s00402-023-04999-4

Saucerization of complete discoid lateral meniscus is associated with change of morphology of the lateral femoral condyle and tibial plateau

Arch Orthop Trauma Surg. 2023 Dec;143(12):7019-7026. doi: 10.1007/s00402-023-04999-4. Epub 2023 Jul 31.

Authors

Takuya Kinoshita¹, Yusuke Hashimoto², Kazuya Nishino¹, Ken Iida¹, Hiroaki Nakamura³

Affiliations

¹ Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan.
² Department of Orthopaedic Surgery, Osaka Metropolitan University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan. hussyyomu@omu.ac.jp.
³ Department of Orthopaedic Surgery, Osaka Metropolitan University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan.

PMID: 37522940
DOI: 10.1007/s00402-023-04999-4

Abstract

Purpose: To determine the effect of saucerization surgery on knee joint morphology associated with a complete discoid lateral meniscus (DLM) using magnetic resonance (MR) imaging.

Methods: This retrospective study included cases had undergone saucerization surgery for symptomatic DLM between 2007 and 2022. All cases were divided into two by age group: < 12 (U13) and > 13 (O13). The cases in the match group were randomly selected from preoperative cases in the O13 group matched with the age at the final follow-up (F/U) of cases in the U13 group. The following morphological parameters were evaluated using MR images preoperatively and at the final postoperative F/U in each group: anterior obliquity of the lateral tibial plateau (AOLTP), posterior obliquity of the lateral tibial plateau (POLTP), and the lowest point of the lateral femoral condyle (LPLFC). Each parameter was compared between the U13 preoperative (pre-OP) group and the O13 pre-OP group, the preoperative and final follow-up in the U13, and the U13 group at the final F/U and the match group preoperatively.

Results: A total of 77 cases were evaluated. 31 cases were in the U13 pre-OP group and 46 were in the O13 pre-OP group. With a minimal F/U of 2 years, 27 cases in the U13 group and 36 in the O13 group were included. The mean F/U period was 4.6 years in the U13 group and 3.2 years in the O13 group. 32 cases were included in the match group. In the match group, the inclination of the POLTP was significantly larger (P = 0.042) and the LPLFC was more lateral (P = 0.0034) than at the final F/U in the U13 group.

Conclusions: Saucerization surgery for DLM in juvenile patients can prevent progression to the characteristic bone morphology DLM. These results could help the surgeon making the decision when the surgery would be performed for symptomatic DLM patients.

Level of evidence: Retrospective comparative study; level of evidence, 3.

Keywords: Discoid lateral meniscus; Knee joint morphology; Magnetic resonance imaging; Saucerization surgery.

MeSH terms

Arthroscopy / methods
Humans
Joint Diseases* / pathology
Knee Joint / anatomy & histology
Knee Joint / diagnostic imaging
Knee Joint / surgery
Magnetic Resonance Imaging / methods
Menisci, Tibial* / diagnostic imaging
Menisci, Tibial* / surgery
Retrospective Studies
Tibia / surgery