Rheumatology, MSK, Skin Flashcards
What is the typical age presentation for ankylosing spondylitis?
20 - 40 years of age
What are the common clinical presentations of ankylosing spondylitis?
lower back pain, enthesitis, dactylitis, and extraarticular manifestations include restricitive lung disease and uveitis
What is the diagnosis for ankylosing Spondylitis?
MRI for acute presentation and X-ray for late presentation
Schober test less than 5cm is an indication of positive test for ankylosing spondylitis.
What is the treatment for ankylosing spondylitis?
NSAIDs for acute flares and if the treatment is refractory then we consider TNF inhibitors.
A patient with a history of psoriasis presents with joint pain serum studies are drawn what antigens do you expect to find in the blood?
Keep in mind that psoriatic arthritis is a seronegative arthropathy and thus even though HLA-B27 is associated with disease we typically don’t see it in the serum
What is the diagnosis of psoriatic arthritis?
Labs like the ESR and CRP will be elevated and RF and CCP are negative and a history of psoriasis or a family history
What are the joints most associated with psoriatic arthritis?
Knee, Ankle, and DIP
What is a definitive extraarticular manifestation of psoriatic arthritis?
Onycholysis (nail changes)
Is a manifestation of psoriatic arthritis. Called the pencil in cup deformity. Remember that the spondyloarthropathies are inflammatory disorders and therefore have the opportunity to destroy the joints.
What is the treatment for psoriatic arthritis?
First line is to start NSAIDs (diclofenac, ketorolac, aspirin, etc). Second line would be DMARD’s and we usually start with methotrexate or sulfasalazine. If those are not effective treatment then we move to TNF-a inhibitors.
What are the side affects of steroids?
bone fractures, psychosis, hypercalcemia
If you suspect that joint pain occurs do to an inflammatory bowel disorder what are the labs that you can draw?
Fecal Calprotectin and CRP
What is the most common bug to cause reactive arthritis?
Chlamydia, also consider gram negative organisms like salmonella, shigella, Yersinia, campylobacter and C. Diff
How does reactive arthritis usually present?
The patient typically presents with a viral infection 1-4 weeks before arthritic symptoms . Even though the infection is cleared. It’s because of the molecular mimicry that there is a residual reaction. I can’t, see I can’t pee I cant bend my knees.
Keratoderma blennorrhagica
What joints does pseudogout most commonly affect?
Larger joints like the knee
What is the finding on arthrocentesis of the joint in a patient with pseudogout ?
Calcium pyrophosphate crystals with rhomboid shape and positively birefringent
What is a common X-ray finding of pseudogout?
Chondrocalcinosis seen in cartilage and ligaments
What are the X-ray findings in gout?
Well-defined punched-out erosion with a thin rim of calcification.
What is the treatment for pseudogout?
NSAIDs, colchicine, and steroids if either is ineffective or contraindicated
What are the ways in which we end up with high levels of uric acid?
Either we produce to much or we don’t excrete it effectively (kidneys)
What is the presentation of gout/pseudogout?
Patients develop acute onset of joint pain that is severe.
What medications increase the risk of formation of uric acid stones?
Thiazides and loop diuretics, also aspirin
This is showing uric acid crystals
What is tophaceous gout?
This the chronic accumulation of urate crystals in the soft tissue
What is the contraindication to using Probenicid?
Patients with kidney disease
When should we start prophylactic gout attack medication?
2-4 weeks after an acute gout attack
What are the ways in which septic arthritis may be acquired?
Hematogenous, contiguous spread, and direct inoculation.
What is migratory arthritis?
There is inflammation of joints resolution and joint inflammation will start somewhere else.
What are common causes of migratory arthralgias?
SLE, rheumatic fever, lyme disease, DGI, Reactive arthritis
What are the most common risk factors for septic arthritis?
Rheumatoid arthritis and osteoarthritis
What criteria can we use to estimate the likely hood of septic arthritis?
Kocher test
In addition to antibiotic therapy what should be the next step in treatment for septic arthritis?
The patient should have joint drained
What is the classic triad for disseminated gonococcal infection?
Polyarthralgia, vesiculopustular rash, tenosynovitis
If you suspect a patient has DGI what test is necessary to confirm Nisseria gonorrhea (hint: the same test is used to diagnose chlamydia)
NAAT
When should we suspect a patient has tuberculosis arthritis?
If they are coming from an endemic area, infection with TB, immunocompromised, malnutrtion or alcholic
What are the diagnostic testing studies that would confirm a patient had TB arthritis?
Tuberculin skin test, IGRA and a synovial biopsy that shows granulomas.
This autoimmune arthritis typically upon waking in the morning takes only a few minutes to resolve?
Osteoarthritis
This autoimune disorder takes several minutes to hours to resolve upon waking in the morning.
Rheumatoid arthritis