Musculoskeletal/Rhematology Flashcards
what test is used to diagnose avascular necrosis; what are the risk factors/predisposing factors
MRI of the hip; chronic steroid use, alcohol and hemoglobinopathies predispose to AVN
list some criteria for diagnosing osteoarthritis
age > 50, no morning stiffness, cold joint, bony tenderness, joint crepitus with motion, joint enlargement
what four areas are commonly tender in fibromyalgia
mid trapezius, costochondral junction, lateral epicondyle, greater trochanter
how is fibromyalgia treated
- exercise and education and sleep hygiene
2. TCAs and duloxetine if lifestyle management doesn’t work
a patient on cyclophophamide should be started on what medication as prophylaxis
mensa to prevent bladder carcinoma and acute hemorrhagic cystitis due to acrolein exposure
how can you differentiate pseudogout from gout
gout crystals are needle shaped and negatively birefringent (parallel=yellow, perpendicular=blue)
pseudogout crystals are weakly positively birefringent and rhomboid in shape
acute treatment of gout includes
NSAIDs, colchicine, steroids
fever, urticaria, polyarthralgia after treatment with a beta-lactam or sulfa drug is suspicious for what
serum sickness
what are the laboratory findings and treatment for serum sickness
hypocomplementemia, high inflammatory markers (ESR and CRP)
patients with Kawasaki disease have fever for >5 consecutive days and 4 out of 5 of which symptoms
- conjunctivitis (b/l, nonexudative)
- mucosal swelling/ strawberry tongue
- rash
- extremity findings: edema/erythema/desquamation of hands and feet
- cervical LAD (usually unilateral)
a child with fever, vesicles in buccal mucosa and small cutaneous lesions on palms and soles has what illness
Hand, foot and mouth disease; caused by Coxsackie virus
how do you differentiate between scarlet fever and Kawasaki’s
scarlet fever does not have conjunctivitis and the rash is more sandpaper like with sparing of the palms and soles; furthermore, you would likely see pharyngitis
what are the two complications of Kawasaki’s
coronary artery aneurysm and myocardial infarction
what’s the most reliable sign for vertebral osteomyelitis?
what can’t you use to diagnose?
exquisite tenderness to gentle percussion of the spinous processes
you can’t use fever or leukocytosis as they are unreliable (may not be elevated)
what is the treatment for nursemaid’s elbow
supination and flexion of forearm OR hyperpronation of the forearm
what is the treatment for suspected scaphoid fracture
initial x-ray, then spica cast immobilization and repeat x-ray in 7-10 days (initial x-ray often misses dx b/c it takes 7 days for a non-displaced fracture to become visible on x-ray)
how does osteoid osteoma present and what is seen on x-ray; how is it treated?
presentation: pain at rest, worse at night, often in proximal femur
x-ray: small round radiolucency (hypodense)
tx: serial x-rays as it self resolves over years, NSAIDs very effective at managing pain
if you suspect giant cell arteritis based on clinical exam and the patient has visual symptoms what should your next step be?
high-dose steroids immediately
THEN get a temporal artery biopsy
what conditions are associated with erythema nodosum
recent strep infection, sarcoidosis, TB, histoplasmosis, IBD
what are the diagnostic criteria for polymyalgia rheumatica and how is it treated
age > 50, subacute- chronic pain in neck or shoulders or hips or , morning stiffness, constitutional sx (fever, weight loss), may see elevated ESR or CRP
Tx= steroids
lateral hip pain that is exacerbated by sleeping on the affected side is suspicious for what
trochanteric bursitis (caused by friction between the tendons of gluteus medius and tensor fascia lata)
what is Legg-Calve-Perthes disease
idiopathic avascular necrosis of the femoral capital epiphysis
how many major or minor criteria do you need to diagnose rheumatic fever
to dx rhematic fever you need preceeding strep infection + 2 major criteria or 1 major and 2 minor
note: minor criteria are fever, arthralgias, elevated ESR or CRP and prolonged PR interval
what is the most prominent extraarticular symptom of ankylosing spondylitis
anterior uveitis
risk factors for gout
ALCOHOL (ethanol–> lactate which competes with urate for renal excretion), obesity, male gender, post-menopausal women, thiazides
what are the main differences between primary Raynaud’s (disease) and secondary Raynaud’s (phenomenon)
primary: no tissue injury, women younger than 30
secondary: tissue injury, men over 40, associated underlying condition (SLE, CREST, cocaine, nicotine, vibratory tools, connective tissue diseases, thromboangitis obliterans, vasoocclusive disorders like DM)
how do you treat Raynaud’s
in primary and secondary you treat with CCB’s; in secondary give aspirin if there is risk of ulceration