Calcific tendinitis of the rectus femoris.

We report 3 patients with acute calcific tendinitis and bursitis of the rectus femoris muscle masquerading hip joint pain. Typically, there is tenderness and warmth lateral to the hip just below the anterior inferior iliac spine. Calcification can be seen on x-rays and may resolve as pain resolves with local injections and antiinflammatory drugs.