MSK Flashcards
1
Q
A
Erlenmeyer Flask
Thalaseamia: coarsened trabeculation producing a ‘cobweb’ appearance.
Osteopetrosis
Pyle disease/ Pick disease
D
OI
Gaucher: osteopenia and pencil thin cortices. Hepatosplenomegaly
2
Q
Erlenmeyer flask deformity, ‘sandwich vertebrae’ and
‘bone within bone’ appearance
A
osteopetrosis.
3
Q
Soft tissue calcification
A
- Tumoral calcinosis
- Haematoma
- Myositis ossificans
- Crystal arthropathy
- Scleroderma
- Dermatomyositis: Sheets of Ca.
- Synovial osteochondromatosis
- Synovial sarcoma
4
Q
Expansile lytic bone lesion, B9
A
- Fibrous dysplasia: GG +/- Ca++
- ABC:
- Posterior elements of the spine.
- soap bubble.
- Fluid fluid level
- Unicameral bone cyst
- central location and expansion.
- Thin sclerotic rim
-
GCT
- epiphyseal extension
- septation
- eccenteric location
- EG:
- well-defined areas of cortical or medullary rarefaction;
- in the later stages, there may be a sclerotic margin, periosteal reaction, and bone expansion.
5
Q
A 71-year-old man with shoulder pain and swelling
A
- Synovial osteochondromatosis
- multiple, round, similar-sized calcified bodies.
- Treatment is resec- tion of the bodies along with synovectomy. Recurrences after surgical debridement can occur.
- PVNS:
- MRI: Joint effusion and focal or diffuse synovial thickening that is low signal on T1 and T2 because of hemosiderin deposition.
- The hemosiderin causes susceptibility artifact and blooming on gradient-echo sequences.
- Treatment is synovectomy; incomplete resection is associated with high recurrence rates.
-
Rice bodies:
- RA
- resembles rice grains
- low T2, joint effusion, synovial hypertrophy and synovial enhancement.
6
Q
A 49-year-old woman with chronic bilateral hand pain and
ulcerations
A
Acro-osteolysis:
- Hyper - PTH:
- Subperiosteal resorption of bone, especially along the radial aspect of the second and third middle phalanges of the hands, is virtually diagnostic
- resorption of the distal clavicles,
- “rugger-jersey” spine,
- brown tumors, and
- resorption of the terminal phalanges.
- Scleroderma: soft-tissue resorption and calcifications with distal phalangeal acro-osteolysis. CREST syndrome.
- Trauma: Frost-bite, burn injury.
- Psoriasis:
- DIP
- soft tissue swelling. peri-articular erosion, fluffy periostitis
- sausage digit
- pencil in cup deformity
- Hajdu-Cheney Syndrome- AD
- enlarged sella
- wormian bones
- basilar invagination
- hearing and speach impairment