Magnetic resonance imaging findings of injuries to the calf muscle complex

@article{Koulouris2007MagneticRI,
  title={Magnetic resonance imaging findings of injuries to the calf muscle complex},
  author={George C. Koulouris and Amy Y. I. Ting and Ashu Jhamb and David A. Connell and Eoin C. Kavanagh},
  journal={Skeletal Radiology},
  year={2007},
  volume={36},
  pages={921-927}
}
ObjectiveThe objective was to describe the imaging findings following acute injury to the calf musculature. [] Key MethodDesign and patientsWe retrospectively reviewed 59 MR examinations in patients who sustained injuries to the calf muscle from April 2001 to September 2004 (48 men, 11 women), with an average age of 31 and 47 years respectively (range in men 20–53; range in women 33–63).

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TLDR
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Isolated tear of the tendon to the medial head of gastrocnemius presenting as a painless lump in the calf

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An isolated tear of the tendon to the medial head of gastrocnemius should be considered in the differential diagnosis of a lump or swelling in the upper medial area of the calf and ultrasound or MRI are recommended as the investigations of choice.
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