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Table 1 Classification of lateral epicondylitis according to Nirschl et al. [11]

From: Prospective randomized controlled trial in the treatment of lateral epicondylitis with a new dynamic wrist orthosis

Stage Characteristics
I Acute inflammation, which can spontaneously heal without residues
II Tendinosis of the tendon with angiofibroblastic hyperplasia, vascular hyperplasia and unorganized collagen
III Partial or complete rupture of the tendons
IV Fibrosis, soft tissue calcifications and osseous calcifications