Negative muscle pennation angle as a sign of massive musculotendinous retraction after tendon tear: paradoxical function of the vastus lateralis muscle

D C Meyer; C Gerber; M Farshad

doi:10.1007/s00167-011-1488-y

Negative muscle pennation angle as a sign of massive musculotendinous retraction after tendon tear: paradoxical function of the vastus lateralis muscle

Knee Surg Sports Traumatol Arthrosc. 2011 Sep;19(9):1536-9. doi: 10.1007/s00167-011-1488-y. Epub 2011 Mar 29.

Authors

D C Meyer¹, C Gerber, M Farshad

Affiliation

¹ Balgrist University Hospital, University of Zürich, Forchstr. 340, 8008 Zürich, Switzerland. dominik.meyer@balgrist.ch

PMID: 21445590
DOI: 10.1007/s00167-011-1488-y

Abstract

In the presented case, an isolated vastus lateralis tendon tear resulted in a negative pennation angle of the distal muscle fibers acting paradoxical to the physiological direction of the proximal muscle fibers. This observation makes the value of an in situ repair of a far retracted tendon tear with interposition of a graft questionable and emphasizes early over late anatomic surgical restoration of the muscle architecture after tendon tears.

Publication types

Case Reports

MeSH terms

Adult
Follow-Up Studies
Humans
Injury Severity Score
Magnetic Resonance Imaging / methods
Male
Occupational Injuries / diagnosis*
Occupational Injuries / surgery
Orthopedic Procedures / adverse effects
Orthopedic Procedures / methods
Pain Measurement
Pain, Postoperative / physiopathology*
Quadriceps Muscle / injuries*
Quadriceps Muscle / pathology
Quadriceps Muscle / surgery
Sprains and Strains / pathology
Sprains and Strains / surgery
Tendon Injuries / diagnosis
Tendon Injuries / surgery*
Time Factors
Treatment Failure
Workers' Compensation