Extra stuff Flashcards
Extension of the PIPs and flexion of the DIPs=
Swan neck deformity- RA
Flexion of the PIPs and extension of the DIPs=
Boutoneirres deformity- RA
Subchondral sclerosis aka
Eburnation
What is an increase in mechanical stress that causes thickened existing trabeculation and formation of new ones?
Subchondral sclerosis- localized compensatory increase in bone mass
What is the gelling phenomenon?
Fluid inside joint becomes thickened like gel, causes stiffness especially in the morn or at rest
Erosive OA is a variant of DJD that appears?
Unusually inflammatory- not to be confused with RA
What is the classic radiographic finding with erosive arthritis?
Gull wing appearance- DIP
What is the name for degeneration of the 1st MTP of the foot with pain and stiffness?
Hallux rigidus
What 2 joint misalignments are common in the feet?
Metatarsus varus
Hallux valgus
With rotator cuff arthropathy you have cystic changes and superior migration of the humerus d/t unopposed deltoid and erosion of the acromion. What is the sign used to describe this?
Hatchet’s sign
Shoulder impingement syndrome is most often due to?
Acromion osteophytes- if acromion points down instead of flat the risk is increased
With HADD, if calcium is within the tendon what happens to ROM?
It moves on the 2 should views and there is a significant decrease in ROM
With HADD, if calcium is within the bursa what happens?
It is non-moving
What are the 3 knee compartments?
Medial tibiofemoral
Lateral tibiofemoral
Retropatellar
What is an asymmetric loss of joint space in the medial compartment of the knee?
Genu varus- bow legged
What is calcification of the MCL d/t trauma contacting lateral knee?
Pelligrini-steida calcification
Where do you see Pelligrini-steida?
Coming off the medial femoral condyle
What is synovial tissue metaplasia that produces cartilaginous tissue with multiple intra-articular loose bodies?
SOM- synovial osteochondrometaplasia
SOM tends to lie within the joint ______ rather than the joint ______.
Capsule; space
What is a slow growing, benign and locally invasive tumor/ metaplasia of the synovium?
Pigmented villanodular synovitis PVNS
Where is PVNS most common?
Knee
What should you consider in a young patient with unexplained hip pain?
PVNS
What is the radiographic sign seen with pigmented villonodular synovitis?
Apple core deformity- concentric erosions of neck and femoral head
How do you differentiate PVNS from RA or OA?
Joint space unaffected, cystic changes and usually slighter changes
What is a thickening of cortex at medial aspect of femoral neck in response to increase in stress?
Buttressing
What is a “bad old hip”
Malum coxae senillis
Where does most degeneration happen at the hip?
Superior compartment 80%
What joints are typically affected with hypertrophic and atrophic arthropathies?
Hypertrophic= weight bearing joints Atrophic= non-weight bearing joints
What is the most common cause of neurotrophic arthropathies?
Diabetes
When the knee and lumbar are involved in a neurotrophic arthropathy what is usually the cause?
Tabes dorsalis
When the talonavicular or tarsometatarsal are involved in a neurotrophic arthropathy what is usually the cause?
Diabetes
What are the 6 D’s seen on films for NA?
Distended joints Density increase Debris Dislocation Disorganization Destruction
Bag of bones
What are the common etiologies for hypertrophic neurotrophic arthritis?
Diabetes
Syphilis- Charcot joints
Spinal cord trauma
Usually feet, knees and hips
What causes a tapered bone appearance leading to a sharpened pencil point appearance like a licked candy stick?
Atrophic neurotrophic arthritis
What is a common example of atrophic neurotrophic arthritis?
Bone resorption of proximal humerus 2nd to Syringomyelia
What is the name of the radiographic sign associated with atrophic neurotrophic arthritis?
Cut off sign
Who catergorized disc degeneration based on anatomy of the disc?
Resnick and Niwayama
What are the 4 seroPOSITIVE inflammatory joint diseases?
RA
SLE
Scleroderma/ PSS
Jaccoud’s
What are the 4 seroNEGATIVE inflammatory joint diseases?
I don't like PEARs Psoriatic arthritis Enteropathic arthritis AS Reactive/ reiters
With RA, what is the abnormal layer of fibrovascular formation?
Pannus formation
What is a “rat bite” seen on films with RA?
Marginal erosions-Localized loss of articular cortex at bare area or joint margin; no sclerosis
What do you see large pseudocysts on films with RA?
D/t synovial fluid and extension of the pannus
What is the first radiographic feature seen with RA?
Periarticular soft tissue swelling
What is a soft tissue swelling adjacent to the MCP?
Haygarth node- RA
What does SLAC stand for?
Scapho-lunate Advanced collapse- RA
What is “spotty carpal” sign?
Erosions at the radial styloid and carpal bones- RA
What is the “zig zag” sign?
Loss of carpal joint space, radial rotation with ulnar deviation of the fingers- RA
Baker’s cysts are usually seen with what condition?
RA
Acetabular protrusion is common in?
RA
RA most commonly does what to the ADI?
Increases it
What percent of RA patients have C spine involvement?
80%
What are the juvenile arthritis aka?
Still’s disease
Juvenile chronic/idiopathic arthritis
Onset prior to 16
Are patients usually seronegative or positive with JRA?
Seronegative- unlike adult RA
Seropositive patients have worst prognosis
What are some of the common growth deformities seen with JRA?
Ballooned epiphysis
Squashed carpi and brachydactyly
With what condition would you see increased ADI, hypoplastic C2-C4 bodies, discs with ankylosis apophyseal joints and osteopenia?
JRA
Where are the typical radiographic findings seen with SLE?
Hands; spinal abnormalities uncommon
Transverse ligament laxity may rarely occur and osteoporotic compression fractures may happen secondary to corticosteroid therapy
What are the reversible deformities seen with SLE?
Ulnar drift
Swan-neck
Boutonnière
Hitchhiker
What is a non-erosive, reversible joint deformity with ulnar deviations and flexion of MCPs as well as fibular deviation of MTPs?
Jaccoud’s arthropathy
What is a generalized inflammatory CT disorder involving skin, lungs, GI, heart, kidneys and MS system?
Scleroderma/ progressive systemic sclerosis
No spine involvement
Who does scleroderma most commonly affect?
Women 30-50
How does scleroderma usually present initially?
GI symptoms
Raynaud’s
RA- like arthritis
What does CREST stand for?
Calcinosis Raynauds Esophageal dysmotility Sclerodactyly Telangiectasia
What is the resorption of distal bony phalanges?
Acro-osteolysis
What is a rare autosomal recessive bone dysplasia characterized by osteosclerosis and short stature?
Pyknodysostosis
What is the MC seronegative spondyloarthropathy and 2 aka?
AS
Marie Strumpell
Bechterew disease
100% of AS involves?
SI joint
What are the 3 stages of SI issues with AS?
1 pseudowidening
2 erosion and sclerosis MC
3 ankylosis
What is the name of the sign for erosions of SI joint?
Rosary bead sign
What is the star sign?
Upper SI ankylosis
What is see through ankylosis
Ghost joint
What percent of AS patients will develop complete ankylosis?
50%
40% will get to stage 2 and then resolve
the familial form of acro-osteolysis is also known as?
Hajdu- Cheney syndrome
what is the acronym for scleroderma and diffuse acro-osteolysis?
PINCHFO
Pyknodysostosis or Psoriasis Injury (frostbite, thermal) Neuropathy (diabetes) Collagen vascular disease (scleroderma, raynauds) Hyperparathyroidism Familial (Hajdu-cheney, progeria) Occupational (polyvinyl exposure)
what is an inherited shortening of fingers and toes d/t unusually short bones?
brachydactyly
what is a thickening and tightening of the skin of the hands and fingers?
sclerodactyly
what is pannus?
hyperplastic synovitis
what term describes an intermittent absence of the articular cartilage d/t erosion?
dot dash appearance- RA
what is felty’s syndrome?
leukopenia, splenomegaly and RA
what are the 4 stages of RA?
- synovitis
- pannus
- fibrous ankylosis
- bony ankylosis
what percent of patients develop RA in the cervical spine?
50% within 10 years of diagnosis
what is the MC cause of UC neurologic sx in someone with RA?
atlanto-axial impaction
what are the common presentations of RA in the cervical spine?
apophyseal joint disease decreased disc height subluxation osteoporosis spinous process/odontoid erosion
where are the 3 spots your see odontoid erosions from RA?
btw dens and arch
btw dens and transverse ligament
tip of dens