MR imaging features of chronically torn anterior cruciate ligament

M. Niitsu, M. Kuramochi, K. Ikeda, T. Fukubayashi, I. Anno, Y. Itai

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Magnetic resonance (MR) images of 40 knee joints with arthroscopically proved chronic anterior cruciate ligament (ACL) tears were retrospectively evaluated. MRI demonstrated various features of chronic ACL tears: 19 knees revealed with no identifiable ligamentous structure, and 21 had residual ligamentous structures. These pseudoligaments, 14 discontinuous bands and seven continuous bands with elongation, were residual torn ligamentous fibers and/or synovial tissues. All the discontinuous bands were disrupted from the femoral attachment and were likely to traverse the lower intercondylar space. Six disrupted ligaments were attached to the lateral aspect of the posterior cruciate ligament (PCL). Coronal T2-weighted gradient echo images showed better delineation of the disrupted femoral attachment and adhesion to the PCL. A chronic ACL tear with minimal elongation or with PCL attachment at a higher position may occasionally be difficult to distinguish from an intact ligament.

Original languageEnglish
Pages (from-to)477-482
Number of pages6
JournalNippon Igaku Hoshasen Gakkai zasshi. Nippon acta radiologica
Issue number7
Publication statusPublished - 1995 Jun
Externally publishedYes


ASJC Scopus subject areas

  • Medicine(all)

Cite this

Niitsu, M., Kuramochi, M., Ikeda, K., Fukubayashi, T., Anno, I., & Itai, Y. (1995). MR imaging features of chronically torn anterior cruciate ligament. Nippon Igaku Hoshasen Gakkai zasshi. Nippon acta radiologica, 55(7), 477-482.