arthritis

Question 1

What are the hallmarks of OA?

Answer 1

joint space narrowing, sclerosis, and osteophytosis

Question 2

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

Answer 2

DISH

Question 3

What are the two types of OA?

Answer 3

Primary - middle aged females, bilaterally symmetric

Secondary - degenerative, mechanical

Question 4

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

Answer 4

Sacrioliac
AC
TMJ
Symphysis pubis

SATS on the painful part

Question 5

What are the hallmarks of RA?

Answer 5

ST swelling
Osteoporosis
Joint space narrowing
Marginal erosions

Question 6

What are causes of high riding shoulder?

Answer 6

RA
CPPD
Rotator cuff tear

Question 7

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

Answer 7

Lack of osteophytes and sclerosis relative to joint space narrowing

Question 8

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

Answer 8

Infection and DJD

Question 9

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

Answer 9

gout

Question 10

What are the hallmarks of psoriatic arthritis?

Answer 10

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

Question 11

What is unique about the calcaneal spur in psoriatic?

Answer 11

fuzzy margins as opposed to well corticated heel spur in DJD

Question 12

What is different about reiters vs psoriasis?

Answer 12

Reiters affect mainly men

Reiters predominantly affects the foot

Question 13

How long before gout shows up radiographically?

What are the hallmarks?

Answer 13

4-6 years

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

Question 14

What gives marginal erosions with SCLEROTIC margins?

Answer 14

Gout

Question 15

What 3 areas a predisposed to chondrocalcinosis

Answer 15

Knee, TFCC, pubic symphysis

Question 16

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

Answer 16

Reiters - IP

Gout - MCP

Question 17

Where are the common sites for CPPD

Answer 17

Shoulder, elbow
Patellofemoral joint
MCP
Radiocarpal joint

Question 18

DJD in the elbow or first carpal row suggest what?

Answer 18

CPPD

Question 19

What three diseases are associated with CPPD?

Answer 19

Hyperparathyroidism
Hemachromatosis
Gout

Question 20

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

SLE
Dermatomyositis
Scleroderma

What is a common feature?

Answer 20

Ulnar deviation

Intramuscular/fascial calcification

Subcutaneous calcification

Soft tissue wasting and osteoporosis

Question 21

What is the osseous involvement of sarcoid?

Answer 21

Lace like lytic lesions of the phalanges

Question 22

Lace like lytic lesions in the phalanges suggests what?

Answer 22

Sarcoid

Question 23

What is the characteristic location of hemachromatosis arthritis?

Answer 23

2nd through 4th MCP

Question 24

What are the hallmarks of a neuropathic joint?

Answer 24

Joint destruction
Dislocation
Heterotopic new bone formation

Question 25

What are the hallmarks of JRA and hemophilia? What is thought to be the cause? What are the findings also seen in ?

Answer 25

Overgrowth of the epiphyses Gracile diaphyses Widening of the intercondylar notch in the knee Tibiotalar slant Disuse and hyperemia Paralysis

Question 26

What is synovial osteochondromatosis? Where is it seen?

Answer 26

Metaplasia of the synovium resulting in deposition of cartilage in the joint Deposits can calcify Knee, hip, elbow

Question 27

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

Answer 27

30% Effusions and erosions Can have "apple core" appearance of femoral neck if severe enough

Question 28

What is tumefactive synovial osteochondromatosis?

Answer 28

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

Question 29

What is the appearance of PVNS on MR?

Answer 29

low signal hemosiderin lining the synovium on both T1 and T2

Question 30

What is sudecks atrophy? What is seen radiographically?

Answer 30

Chronic regional pain syndrome, occurs after minor trauma Severe, patchy osteoporosis and soft tissue swelling in a distal extremity

Question 31

What is the progression of CRPS?

Answer 31

Pain subsides with persistent osteoporosis Swelling subsides, but skin may remain atrophic

Question 32

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

Answer 32

10 is effusion

Question 33

What is the hallmark of AVN? What is the earliest sign? What is the progression radiographically?

Answer 33

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

Question 34

What is osteochondritis dessicans? Where does it occur?

Answer 34

idiopathic focal AVN medial epicondyle femur talar dome elbow capitellum

Question 35

What is a joint mouse?

Answer 35

Free fragment that has arisen off of and OCD lesion

Question 36

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

Answer 36

AVN RA OA CPPD

Question 37

What are the following eponymous AVNs: ``` keinbock kohler freiberg infraction legg calves perthes scheuermanns osgood schlotter ```

Answer 37

``` lunate navicular metatarsal head femoral head ring epiphyses of spine tibial apophysis ```

Question 38

What is negative ulnar variance associated with?

Answer 38

Keinbocks malacia