Preliminary diagnosis of medial meniscus posterior root tears using the Rosenberg radiographic view

Yuya Kodama, Takayuki Furumatsu, Yusuke Kamatsuki, Takaaki Hiranaka, Tomohiro Takahata, Masayuki Sadakane, Haruhiko Ikuta, Masaharu Yasumitsu, Toshifumi Ozaki

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Purpose: To verify the effectiveness of detecting medial meniscus posterior root tears (MMPRTs) using weight-bearing posterior-anterior (PA) radiographs. Materials and methods: Twenty-three patients were diagnosed with an MMPRT using magnetic resonance imaging (Group A), with 23 matched individuals forming the control group (Group B). The distance between medial tibial eminence and the lateral edge of the medial femoral condyle (MTE–MFC distance) and medial joint space (MJS) width were measured on weight-bearing PA radiographs, with the knee flexed at 45° (Rosenberg view). Absolute medial meniscus extrusion (MME) was measured on magnetic resonance images. Results: The MTE–MFC distance was greater and the MJS width was smaller in Group A than Group B (7.7 ± 1.7 mm versus 6.0 ± 1.24 mm and 3.2 ± 0.8 mm versus 4.5 ± 0.7 mm, respectively; P < 0.05). The MTE–MFC distance and MJS width correlated with MME (r = 0.603 and 0.579, respectively; P < 0.05), and the extent of MME was greater in Group A than Group B (4.1 ± 1.1 mm versus 1.8 ± 1.5 mm, respectively; P < 0.05). Conclusions: MMPRTs increase the MTE–MFC distance and decrease the MJS width, with these measurements correlating to the MME. Therefore, measurement of the MTE–MFC distance and MJS width on the Rosenberg view could be a useful preliminary method for the diagnosis of an MMPRT. Level of evidence: IV

Original languageEnglish
Article number9
JournalKnee Surgery and Related Research
Volume31
Issue number1
DOIs
Publication statusPublished - Dec 2019

Keywords

  • Joint space
  • Medial meniscus
  • Meniscal extrusion
  • Posterior root tear
  • Rosenberg view
  • Weight-bearing radiograph

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

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