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Am J Sports Med. 2004 Apr-May;32(3):710-9.

Acute quadriceps muscle strains: magnetic resonance imaging features and prognosis.

Author information

1
North Syndey Orthopaedic & Sports Medicine Centre, Sydney Sports Medicine Centre, Olympic Park, Crows Nest, North Sydney, Australia.

Abstract

BACKGROUND:

There has been no research examining the magnetic resonance imaging findings, and in turn the prognosis, for a series of acute quadriceps muscle strains.

HYPOTHESIS:

The magnetic resonance imaging findings of acute quadriceps muscle strain injuries are helpful in predicting their prognosis.

STUDY DESIGN:

Causal-comparative study.

METHOD:

Forty professional players of Australian Rules football were followed over 3 years. Magnetic resonance imaging examinations were performed within 24 to 72 hours of muscle-strain injury. Imaging features of muscle strain injury included the anatomical location, size (cross-sectional area and length), and site (proximal, middle, or distal). The time from injury to return to full training was termed the rehabilitation interval.

RESULTS:

25 clinical quadriceps muscle strain injuries occurred, with 15 cases involving the rectus femoris. The rectus femoris injuries could be further categorized into cases with straining about the central tendon (n = 7, mean rehabilitation interval = 26.9 days) or cases with straining in the periphery (n = 8, mean rehabilitation interval = 9.2 days). Six cases involved one of the vastus muscles (mean rehabilitation interval = 4.4 days). Three players had normal magnetic resonance imaging examinations (mean rehabilitation interval = 5.7 days).

CONCLUSIONS:

The rectus femoris-central tendon injury is the red flag diagnosis associated with a significantly longer rehabilitation interval.

CLINICAL RELEVANCE:

Magnetic resonance imaging is helpful in predicting the prognosis for acute quadriceps strains.

PMID:
15090389
DOI:
10.1177/0363546503261734
[Indexed for MEDLINE]

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