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R1 > MSK > Flashcards

MSK Flashcards

1
Q

avulsion fx –> iliac crest –> what muscle?

A

transversalis, internal & external obliques

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2
Q

avulsion fx –> ASIS –> what muscle?

A

sartorius

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3
Q

avulsion fx –> AIIS –> what muscle?

A

rectus femoris

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4
Q

avulsion fx –> iliac tuberosity –> what muscle?

A

hamstrings:
- biceps femoris
- gracilis
- semimembranosus
- semitendinosus

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5
Q

avulsion fx –> lesser trochanter –> what muscle?

A

iliopsoas

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6
Q

osteoid osteoma –> involves what type of bone? which part of the bone?

A

lower ext –> long bone –> metaphysis or diaphysis –> intracortical

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7
Q

osteoid osteoma –> MC age range

A

teens

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8
Q

osteoid osteoma –> radiographic finding

A

cortex –> lucent nidus -> surrounding sclerosis

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9
Q

osteoid osteoma –> clinical presentation

A

pain worse at night –> relieved w aspirin

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10
Q

osteoid osteoma –> tx?

A
  • surgical excision

- CT-guided percutaneous ablation

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11
Q

what is osteochondroma?

A

osteocartilaginous exostosis (cartilage-capped bony projection)

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12
Q

osteochondroma –> what part of bone?

A

metaphysis –> cortex

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13
Q

osteochondroma –> MC bones? (3)

A
  • tibia
  • femur
  • humerus
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14
Q

osteochondroma –> complication (3)

A
  • growth abnormality –> ie bowing, limb shortening
  • compression of adjacent vessels/nerves
  • malig transformation to chondrosarcoma
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15
Q

bony lesion: types of matrix? (4)

A
  • no matrix
  • chondroid (arcs of bony rim)
  • fibrous (groundglass)
  • osseous
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16
Q

Romanus lesion & shiny corner –> dx?

A

inflammatory spondyloarthropathy:

  • ankylosing spondylitis
  • enteropathic arthritis
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17
Q

Romanus lesion –> what does it look like?

A

irregularity & erosion of ant/post vertebral endplates

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18
Q

shiny corner –> what does it look like?

A

T2 hyperintense corner of vertebral body (reactive sclerosis)

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19
Q

band acro-osteolysis –> ddx? (2)

A
  • polyvinyl chloride exposure

- Hajdu-Cheney synd

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20
Q

terminal acro-osteolysis –> ddx? (4)

A
  • psoriatic arthritis
  • hyperPTH
  • thermal injury
  • scleroderma
21
Q

amyloid arthropathy –> assoc with what other condition?

A

chronic renal failure on longterm dialysis

22
Q

amyloid arthropathy –> imaging features (2)

A
  • chronic erosions

- preserved jt space

23
Q

dermatomyositis –> increased risk for what condition?

A

malignancy

24
Q

Pagets disease –> complication –> malignant transformation –> what malignancy?

A

osteosarcoma

25
Q

spondylitis –> etiology? (4)

A
  • ankylosing spondylitis
  • juvenile RA
  • psoriatic arthritis
  • septic arthritis
26
Q

lateral subtrochanteric cortex –> focal new bone formation –> internal linear lucency –> dx?

A

bisphosphonate-related proximal femoral fx

27
Q

Looser zones –> aka? (3)

A
  • cortical infraction
  • Milkman lines
  • pseudofracture
28
Q

Looser zones –> what is? what does it look like?

A

insufficiency fx –> transverse lucency –> partway thru bone –> perpendicular to cortex –> sclerotic borders

29
Q

Looser zones –> assoc with what condition?

A

osteomalacia/rickets

30
Q

Looser zones –> common locations? (5)

A
  • pubic rami
  • medial femoral neck/shaft
  • lateral scapula
  • posterior proximal ulna
  • ribs
31
Q

Segond fx –> location?

A

proximal tibia –> lat

32
Q

differentiate: perilunate vs lunate dislocation

A

perilunate:
- normal radiolunate jt
- carpal bones dislocated relative to lunate

lunate:
- lunate completely dislocated volarly
- other carpal bones normal position

33
Q

perilunate vs lunate dislocation –> which is more severe?

A

lunate

34
Q

primary vs secondary osteosarcoma –> which has worse prognosis?

A

secondary

35
Q

least common type of shoulder dislocation?

A

inferior

36
Q

inf shoulder dislocation –> MC assoc complication?

A

brachial plexus neurovascular injury

37
Q

gullwing appearance –> classically seen in what arthropathy?

A

erosive osteoarthritis

38
Q

Morton neuroma –> pathophys?

A

foot –> intermetatarsal ligament –> chronic entrapment of plantar nerve –> perineural fibrosis

39
Q

osteosarcoma –> which type has best prognosis?

A

parosteal

40
Q

achilles tendon –> tendinosis –> MRI findings? (2)

A
  • tendon thickening –> fusiform shape

- T1 diffuse low signal

41
Q

aneurysmal bone cyst –> primary & secondary causes

A
  • primary: prior trauma

- secondary: pre-existing condition (fibrous dysplasia, giant cell tumor, chondroblastoma, …)

42
Q

Which structures constitute the pes anserinus

A

Sartorius, semitendinosus, gracilis tendons

43
Q

“double PCL” sign indicates?

A

Bucket-handle tear of the medial meniscus

44
Q

what tendon is the primary support of the midfoot arch.

A

Posterior tibial tendon

45
Q

malig tumor characterized by a subarticular location

A

chondrosarcoma

46
Q

osteosarcoma –> which type has the worst prognosis

A

2ary

47
Q

red marrow to fatty marrow –> order of conversion?

A

The epiphyses convert to fatty marrow soon after they ossify. Diaphysis precedes metaphysis and distal precedes proximal

48
Q

pes anserinus –> insert?

A

anteromed tibia

R1 (15 decks)

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