PURPOSE: The aims of this study were twofold. The first was to compare the functional capacity and pain of patients with knee osteoarthritis (KOA), with or without pes anserine tendino-bursitis (PATB). The second is to compare the efficacy of two treatment methods (physical therapy and corticosteroid injection) for patients with PATB. SUBJECTS AND METHODS: Sixty patient with KOA and PATB (group 1) and 57 patients with KOA but without PATB (group 2) were enrolled in the study. The patients' visual analog scale (VAS), Western Ontario and McMaster Universities osteoarthritis index (WOMAC) scores and three-meter timed-up and go scores were measured. The PATB group was randomly divided into two groups (group A and B). Physical therapy (PT) modalities were applied to the first group (group A), and the second group (group B) received corticosteroid injections to the pes anserine area. Eight weeks later, patients' parameters were measured again. RESULTS: Initial WOMAC scores and timed up-and-go times were significantly higher in group 1 than in group 2. Both treatments resulted in significant improvements in all measured parameters, but no significant difference was detected between group A and B. CONCLUSION: Patients with PATB tend to have more severe pain, more altered functionality, and greater disability than those with KOA but without PATB. Both corticosteroid injection and PT are effective methods of treatment for PATB. Injection therapy can be considered an effective, inexpensive and fast therapeutic method.

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