Abstract

  An enthesopathy developed at the distal quadriceps femoris in a professional pitcher was quite rare. We treated the enthesopathy unrecovered with a preceding 3 months conservative therapy by using a neutrophil-reduced platelet-rich plasma (PRP). The patient was 27 years old, a right overhand pitcher. The pain occurred in his left knee during the acceleration phase of pitching motion. A Power Doppler analysis showed an abnormal hypervascularity area and the magnetic resonance (MR) revealed an enthesopathy with a partial tear at the distal insertion site of the quadriceps femoris tendon. The PRP therapy was performed twice separated by a three weeks interval. Concentrations of platelets or neutrophils in PRP were adjusted to be optimal for the treatment of the tendinopathy. He returned to his previous sport activity level at 11 weeks without symptoms. The hypervascularity region disappeared on Power Doppler images and the partial tear observed on MR scans also receded. A rare quadriceps femoris tendinopathy in baseball pitcher was recovered with a therapy using PRP containing optimal concentrations of platelets or neutrophils.

Keywords: Tendinopathy; Platelet-Rich Plasma; Baseball Pitcher; Quadriceps Femoris Tendon

References

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Citation

Citation: Mamoru Yoshida. “A Tendinopathy of the Distal Quadriceps Femoris in a Professional Pitcher Treated with a Neutrophil-Reduced Platelet-Rich Plasma: A Case Report".Acta Scientific Orthopaedics 3.10 (2020): 02-04.

Copyright

Copyright: © 2020 Mamoru Yoshida. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.