Avascular necrosis of the hip symptoms and conditions

In July of 2005, I was prescribed 14 doses of Levaquin 750 mg for a bad case of viral pneumonia and mononucleosis. After two days of insomnia, I developed extremely painful feet, especially the bottoms of my feet. Last month (Aug 2007) I was diagnosed with Avascular Necrosis of the Hip, and just had my right hip replaced (total). At age 45, I am fairly young to have developed such an ailment and other than July of 2005, have been healthy and active my entire life. In retrospect, I am beginning to wonder if Levaquin caused my avascular necrosis, as the doctors are at a loss.

To the person that said weight gain is an excuse...have you ever heard of Cushing's syndrome or disease..well I've had both. The disease is an over production of steriods that your adrenal glands produce and is usually caused by a tumoron the adrenals or pituitary gland. In my case it was on the pituitary gland. I've always weighed around 125. The tumor caused me to have a moon face and gain so much weight that people didn't recognize me. I also had to have a hip replacement because the high amounts of steriods in my system caused avascular necrosis of the hip. I was 33 at the time. Now, two years later and cured from the Cushing's disease because of surgery to remove the tumor, I am on prednisone for colitis. I had lost all of my weight from the Cushing's until I started taking pred. again. I've only been on them for 3 months and am down to 5mg. I am depressed and very anxious, and Xanax is NOT helping.