I am 49 with CF and have developed pleuricy as a result of either a broken rib or an infection. About 3 months ago I split a rib by coughing hard, as I have done many times before(severe osteoporosis). I then developed an infection at the site of the break. This has all happened before to me, but this time, after about 2 weeks I started to get this rubbing sensation at the site of the inf./break, and it proceeded to take over most of the lung. Twice went on heavy doses of prednisone starting at 50 a day and weened down to zero over the span of 4/5 weeks. The pred. works, but both times I got down to 20 mg. a day, the Pleuricy returned worse than before. I have Diabetes so I can't keep taking Pred. Has anyone had any experience with this?I'm told it should go away, but it's been over 3 months and it is driving me nuts!! Thanx to all. Richie