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Describe Ficat's classification. What is it used for?
- Used to stage osteonecrosis.
- 1. Normal to slightly incr or decr density
- 2. Mixed osteopenia & sclerosis
- 3. Subchondral collapse ("crescent sign")
- 4. Articular collapse
- 5. Degenerative joint disease
- Caisson's disease
Osgood-Schlatter disease aka...
Osteochondrosis of tibial tuberosity
Radiologic hallmark of hyperparathyroidism? MC locations?
- Subperiosteal bone resorption.
- Radial surface of middle phalanges
- Distal clavicle
- Medial aspect of femur, humerus, tibia
- Distal metaphysis of radius, ulna
MC seronegative spondyloarthropathy?
- Ankylosing spondylitis. "Bamboo Spine" is an Aunt Minnie.
- Dz onset 15-35yo. M>>F.
- 90% HLA-B27+
Presentation: Low back pain/stiffness
Hallmark of ankylosing spondylitis?
Sacroiliitis is hallmark of disease.
Sacroiliac joint is classically the first joint involved in ankylosing spondylitis.
Ossification of annulus fibrosis.
Characteristic of ankylosing spondylitis.
Inflammed angry-looking joint on radiograph. DDx?
- Septic arthritis
Effusion from hemophilia (hemorrhage) is more radiodense than simple effusion.
Septic joint and acute hemarthrosis can present the same (F, incr WBC, warmth, tenderness, etc).
DDx for syndactyly
(can you name 3 or 4?)
- Ellis-van Creveld
- Absent radius syndrome
- Chondrodysplasia punctata
CANT PuT up the FADE-away
Rare hereditary bone dz.
Failure of spongiosum to form properly gives characteristic radiographic appearance.
- "Sandwich vertebra"
- "Erlenmeyer flask deformity"
- "Bone in bone"
"Bone within Bone"