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SEARCH RESULTS FOR: lateral-epicondylitis-tennis-elbow-pathogenesis-and-clinical-findings

lateral-epicondylitis-tennis-elbow-pathogenesis-and-clinical-findings

Lateral Epicondylitis (Tennis Elbow): Pathogenesis and clinical findings Authors: Brett Lavender Reviewers: Alyssa Federico, Liam Thompson, Tara Shannon Gerhard Nikolaus Kiefe* * MD at time of publication Extrinsic Factors: activities involving repeated forceful use of the extensor-supinator muscle groups (sports including tennis and squash, activities such as painting, carpentry or using certain hand tools) Intrinsic Factors: age, body weight, nutrition, gender, anatomical variations, joint laxity, systemic disease, muscle weakness / imbalance, vascular perfusion Micro-tears within extensor-supinator tendons initiating healing process: inflammation, proliferation, and remodeling (see acute wound healing slide) Continued repetitive strains with inadequate recovery time between activitiesàhealing unable to meet tissue damage Ineffective revascularization of damaged tissue MRI or Ultrasound Findings: Tendon thickening, partial tears, disrupted vascular distribution +/- edema of surrounding tissues Disorganized collagen formation and scarringà↑ type III ↑ Nerve growth within damaged tissue collagen (most common collagen involved with wound healing) (consequence of healing response) ↑ Tendon thickening Decreased tensile strength of tendon Weakness of the extensor- supinator muscle groups Lateral Epicondylitis Tendinosis at the common extensor-supinator origin at the lateral epicondyle of the humerus Local nerves are compressed by thickened tendon ànociceptors within tendon are activated Pain with passive wrist Pain localized to flexion or resisted extension lateral epicondyle Tenderness over the proximal wrist extensor-supinator muscles Severity ranges from mild to severe based on the effect on patient activities Mild tendinopathy: patient continues Moderate tendinopathy: patient continues Severe tendinopathy: patient’s daily most activities with minor pain some activities with modifications activities are impacted by severe pain Legend: Pathophysiology Mechanism Sign/Symptom/Lab Finding Complications Published September 25, 2022 on www.thecalgaryguide.com