AB0853 IMPACT OF ULTRASONOGRAPHY‑DETECTED PES ANSERINE BURSITIS ON PAIN ANDFUNCTION IN PATIENTS WITH PRIMARY KNEE OSTEOARTHRITIS

Abstract

Background:Pes anserine bursitis (PAB) is one of the most common causes of knee pain. Hence, this study aimed to compare the pain and function among all primary knee osteoarthritis (KOA) patients with or without ultrasonic-detected PAB and the associated clinical and radiological findings.Objectives:To compare pain, function, and clinical and radiological findings among primary KOA patients with or without ultrasonography-detected PAB.Methods:A single-center cross-sectional study was conducted on 245 patients with primary KOA. Patients with more symptomatic knee examined by musculoskeletal ultrasound (MSUS), then according to the presence or abscence of PAB, the patients were categorized into two groups. To differentiate between grades of inflammation of PAB on ultrasonography, the authors developed a semi-quantitative scale (0–2) as follows: Grade 0, normal hyperechoic picture of pes anserine tendons without tendonitis or bursitis; Grade 1, mild hypoechogenicity and/ or mild swelling or mild loss of fibrillar pattern of the pes anserine tendon and/or mild anechoic effusion related to the tendons; and Grade 2, marked hypoechogenicity and/ or large swelling or marked loss of the pes anserine tendon and/or marked anechoic effusion related to the tendons.. Radiological grades of Kellgren–Lawrence were recorded. Pain and functional status was assessed by visual analog scale (VAS), Health Assessment Questionnaire-II (HAQ-II), and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC).Results:A total of 110 (44.9%) patients were diagnosed with PAB where 91 (82.7%) of them had Grade 1 and only 19 (17.3%) had Grade 2. The presence of PAB was statistically significant related (P< 0.05*) with age, VAS, HAQ-II, WOMAC subscales, synovitis, and radiographic Grades 3 and 4. However, there was no statistically significant difference (P≥ 0.05) between KOA patients without PAB and KOA patients with PAB, regarding sex, body mass index, baker cyst, and effusion.Conclusion:The presence of PAB on MUS is associated with increased pain and disability in KOA. MSUS should be more widely used to establish the association between PAB and symptom severity and disability among KOA patients.