Osteoarthritis Flashcards
most common cause of cartilage loss in middle aged and older adults
Osteoarthritis
What is a subchondral cyst?
herniation of joint fluid into bone through a cartilage defect
Joint space narrowing, subchondral sclerosis, osteophytosis, subchondral cystic changes
oseoarthritis
what other arthropathy besides OA should be considered with extensive subchondral cystic changes are present?
CPPD arthropathy
Finding of CPPD arthropathy that overlaps with OA
subchondral cysts
most common site of OA involvement in the hand
second DIP
Heberden nodule
soft tissue swelling about the DIP
most common site of OA involvement in the foot
first MTP
what is hallux rigidus
big dorsal osteophytes arising off the first MTP leads to decreased range of motion in the first MTP
Joint space in the knee should measure less than _____ mm before cartilage loss is considered
3 mm
Most common axis of hip migration in OA
superolateral joint space narrowing
axial migration of the hip is most commonly seen in:
inflammatory arthropathy such as RA
What are the vertebral body endplates capped by?
hyaline cartilage
Three components of the intervertebral disc
annulus fibrosus, nucleus pulposus, cartilaginous endplates
Kummel disease
gas in a vertebral body compression fracture representing osteonecrosis
gas in a vertebral body compression fracture representing osteonecrosis
Kummel disease
Diffuse idiopathic skeletal hyperostosis
flowing bridging osteophytes spanning at least four vertebral body levels
What is DISH commonly associated with?
ossification of the OPLL
portion of the SI joint that is a synovial joint
inferior 1/3
Gull wing at DIP
erosive OA
distribution of erosive OA
same as OA: DIPS, CMC of thumb, PIPs
