Osteoarthritis Initiative studied 4344 knee OA looking at bulge sign (12.7%) & patellar tap (2%); 3.3% had both. Bulge sign increased risk of freq knee pain (OR 1.31) & TKR [OR 1.47); developing a bulge sign had incr risk of same & Xray worsening (OR 1.67) https://t.co/3HtBrkzAtk