Patellar tendinosis (jumper's knee): Findings at histopathologic examination, US, and MR imaging

Karim M. Khan, Fiona Bonar, Patricia M. Desmond, Jill L. Cook, David A. Young, Paul J. Visentini, Michael W. Fehrmann, Zoltan S. Kiss, Patricia A. O'Brien, Peter R. Harcourt, Richard J. Dowling, Richard M. O'Sullivan, Kenneth J. Crichton, Brian M. Tress*, John D. Wark

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

300 Citations (Scopus)

Abstract

PURPOSE: To determine the histopathologic findings of patellar tendinosis ('jumper's knee') demonstrated with ultrasonography (US) and magnetic resonance (MR) imaging. MATERIALS AND METHODS: Twenty-four athletes (28 knees) with jumper's knee (23 men, one woman; mean age, 30.9 years) scheduled to undergo open tenotomy underwent US patellar tendon examination. Seventeen patients (19 knees) also underwent MR imaging. Tissue was obtained for histopathologic examination in all 28 cases. Eleven age-, height-, and weight-matched athletes (22 knees) without previous knee symptoms served as control subjects for the US examination. Control material for histopathologic examination was obtained in 20 cadavers (39 knees). Data were analyzed with standard statistical methods. RESULTS: MR imaging and US both revealed an abnormal zone at the proximal patellar tendon attachment. Histopathologic examination revealed mucoid degeneration in all tendons in patients and in 8% (three of 39) of tendons in cadavers (P < .01). CONCLUSION: Jumper's knee is characterized by consistent changes at MR imaging, US, and histopathologic examination and is appropriately described as patellar tendinosis.

Original languageEnglish
Pages (from-to)821-827
Number of pages7
JournalRadiology
Volume200
Issue number3
DOIs
Publication statusPublished - Sep 1996
Externally publishedYes

Keywords

  • knee, MR
  • knee, US
  • tendinitis
  • tendons
  • tendons, injuries
  • tendons, MR
  • tendons, US
  • PARTIAL RUPTURE
  • COMPUTED-TOMOGRAPHY
  • OPERATIVE TREATMENT
  • TENDINITIS
  • ULTRASOUND
  • LIGAMENT
  • TENDON
  • ULTRASONOGRAPHY

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