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MSK > arthritis > Flashcards

arthritis Flashcards

1
Q

What are the hallmarks of OA?

A

joint space narrowing, sclerosis, and osteophytosis

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2
Q

What is the only disorder with osteophytes without sclerosis or joint space narrowing?

A

DISH

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3
Q

What are the two types of OA?

A

Primary - middle aged females, bilaterally symmetric

Secondary - degenerative, mechanical

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4
Q

What are the 4 joints that have erosions as a feature of OA?

A

Sacrioliac
AC
TMJ
Symphysis pubis

SATS on the painful part

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5
Q

What are the hallmarks of RA?

A

ST swelling
Osteoporosis
Joint space narrowing
Marginal erosions

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6
Q

What are causes of high riding shoulder?

A

RA
CPPD
Rotator cuff tear

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7
Q

What is the key feature determining OA secondary to RA vs regular OA?

A

Lack of osteophytes and sclerosis relative to joint space narrowing

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8
Q

Outside of AS and IBD, what else can cause bilateral symmetric SI disease

A

Infection and DJD

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9
Q

Outside of Psoriatic and Reiters, what can cause unilateral SI disease

A

gout

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10
Q

What are the hallmarks of psoriatic arthritis?

A

distal predominance
proliferative erosion
soft tissue swelling (sausage digits)
fluffy periostitis

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11
Q

What is unique about the calcaneal spur in psoriatic?

A

fuzzy margins as opposed to well corticated heel spur in DJD

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12
Q

What is different about reiters vs psoriasis?

A

Reiters affect mainly men

Reiters predominantly affects the foot

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13
Q

How long before gout shows up radiographically?

What are the hallmarks?

A

4-6 years

Well defined marginal erosions with overhanging edges
Soft tissue tophi
No osteoporosis

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14
Q

What gives marginal erosions with SCLEROTIC margins?

A

Gout

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15
Q

What 3 areas a predisposed to chondrocalcinosis

A

Knee, TFCC, pubic symphysis

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16
Q

What is the key between reiters and gout involvement of the first toe

A

Reiters - IP

Gout - MCP

17
Q

Where are the common sites for CPPD

A

Shoulder, elbow
Patellofemoral joint
MCP
Radiocarpal joint

18
Q

DJD in the elbow or first carpal row suggest what?

A

CPPD

19
Q

What three diseases are associated with CPPD?

A

Hyperparathyroidism
Hemachromatosis
Gout

20
Q

With regards to the collagen vascular diseases, what is a unique feature of:

SLE
Dermatomyositis
Scleroderma

What is a common feature?

A

Ulnar deviation

Intramuscular/fascial calcification

Subcutaneous calcification

Soft tissue wasting and osteoporosis

21
Q

What is the osseous involvement of sarcoid?

A

Lace like lytic lesions of the phalanges

22
Q

Lace like lytic lesions in the phalanges suggests what?

A

Sarcoid

23
Q

What is the characteristic location of hemachromatosis arthritis?

A

2nd through 4th MCP

24
Q

What are the hallmarks of a neuropathic joint?

A

Joint destruction
Dislocation
Heterotopic new bone formation

25
Q

What are the hallmarks of JRA and hemophilia?

What is thought to be the cause? What are the findings also seen in ?

A

Overgrowth of the epiphyses
Gracile diaphyses
Widening of the intercondylar notch in the knee
Tibiotalar slant

Disuse and hyperemia

Paralysis

26
Q

What is synovial osteochondromatosis? Where is it seen?

A

Metaplasia of the synovium resulting in deposition of cartilage in the joint

Deposits can calcify

Knee, hip, elbow

27
Q

How often do joint mice not calcify? What is the radiographic appearance when this happens?

A

30%

Effusions and erosions

Can have “apple core” appearance of femoral neck if severe enough

28
Q

What is tumefactive synovial osteochondromatosis?

A

Joint mice packed so closely together they appear as a partially calcified mass/

Do not call tumor as they can look like chondrosarcoma on biopsy and lead to erroneous amputation

29
Q

What is the appearance of PVNS on MR?

A

low signal hemosiderin lining the synovium on both T1 and T2

30
Q

What is sudecks atrophy?

What is seen radiographically?

A

Chronic regional pain syndrome, occurs after minor trauma

Severe, patchy osteoporosis and soft tissue swelling in a distal extremity

31
Q

What is the progression of CRPS?

A

Pain subsides with persistent osteoporosis

Swelling subsides, but skin may remain atrophic

32
Q

What is the normal distance between the suprapatellar fat pad and anterior femoral fat pad?

A

10 is effusion

33
Q

What is the hallmark of AVN?

What is the earliest sign?

What is the progression radiographically?

A

Increased bone density with preserved joint space and lack of osteophytes

Joint effusion

Dense bone -> subchondral lucency with thin line on articular surface - > chondral collapse

34
Q

What is osteochondritis dessicans?

Where does it occur?

A

idiopathic focal AVN

medial epicondyle femur
talar dome
elbow capitellum

35
Q

What is a joint mouse?

A

Free fragment that has arisen off of and OCD lesion

36
Q

What are the 4 disorders that can have an essentially normal joint with a subchondral geode?

A

AVN
RA
OA
CPPD

37
Q

What are the following eponymous AVNs:

keinbock
kohler
freiberg infraction
legg calves perthes
scheuermanns
osgood schlotter
A 
lunate
navicular
metatarsal head
femoral head
ring epiphyses of spine
tibial apophysis
38
Q

What is negative ulnar variance associated with?

A

Keinbocks malacia

MSK (8 decks)

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