My daughter is in the diagnostic process for Cystic Fibrosis and she has been complaining about knee pain for a number of months. I have read a few posts about arthritis and its relationship to Cystic Fibrosis. My daughter is scheduled for x-rays on Tuesday and has an appointment with an Orthopedic doctor. Her knees are painful and they also buckle and she has been falling. Prior to this round of knee pain my daughter was a level 8 junior olympic gymnast. Overall she was strong and coordinated until this past winter where her lung disease had gotten much worse and led us toward the Cystic Fibrosis diagnosis. Should I ask for a consult with a Reumatologist? Are there any Ruematologists in the Philadelphia area that are familiar with the Cystic Fibrosis and Arthritis relationship? Any information on the relationship between Cystic Fibrosis and arthritis would be appreciated.