CT scan and then MRI and x-ray shows a cyst or mass in the cup part (acetabulum) of my hip socket on one side. One enlarged lymph node on the other hip. I don't understand radiologist-speak but it looks like I might have tears in the hamstring on the cyst side? Rheumatologist has referred me to orthopedic doctor to determine if a biopsy is needed. Seems like maybe they are fairly common with arthritis and/or rheumatoid arthritis. Anyone have this? Anyone have a biopsy? Kinda scared.