| Eric A. Brandser, M.D.
Peer Review Status: Internally Peer Reviewed
This is an image of advanced RA in the hips.
At first glance, the plain film resembles OA but note the
joints are narrowed symetrically unlike OA. There exists,
however, some subchondral sclerosis due to intervening secondary
OA. The hips look like they will migrate right into the middle
of the pelvis this is called protrusio acetabulae.
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