Rheum Flashcards
(220 cards)
What condition mainly affects the SI joints causing eventual fusion of the spine?
Ankylosing spondylitis
What antigen is positive over 90% of the time with ankylosing spondylitis?
HLA-B27
True or False: Ankylosing spondylitis more often affects males?
True (3:1)
What two main things besides ortho problems is ankylosing spondylitis associated with?
- Eye problems (iritis. uveitis)
2. IBD
Bamboo spine on plain film, night pain, morning stiffness relieved by exercise, pain of large joints (knee), leg/back pain (increased when bending over), low grade fever, weight loss?
Ankylosing spondylitis
How can you differentiate between pain due to ankylosing spondylitis versus low back pain?
AS: Improves with activity and worse with rest
Mechanical: Worse with activity and improves with rest
What happens to ANA, RF, and ESR in ankylosing spondylitis?
ANA/RF: Normal
ESR: Normal or mildly elevated
Kid younger than 10, heliotrope rash on face (similar to lupus), tight/shiny/scaly skin on extensor surfaces of extremities or over interphalangeal joints, periungual lesions?
Dermatomyositis
What is Gottron’s sign?
Tight, shiny, or scaly skin on extensor surfaces of the extremities or over the itnerphalangeal joints (seen in dermatomyositis)
What symptoms does the rash associated with dermatomyositis cause?
- Pruritus
2. Hair loss (if on scalp)
How might the periungual lesions seem in dermatomyositis be described?
Nail fold telangectasias
Describe the heliotrope rash seen in dermatomyositis?
Violaceous “butterfly” discoloration of the malar region and/or eyelids
What are the findings that constitute the “myositis” part of dermatomyositis?
Proximal muscle weakness: Difficulty getting dressed or climbing steps, clumsy, voice change, difficulty swallowing
What is the most appropriate initial step to evaluate a patient with clinical dermatomyositis?
Cretine kinase level (often elevated)
*You would do this before EMG or MRI
What is the most common systemic vasculitis in kids?
HSP
What systems does HSP involve?
Skin, GI, joints, kidneys
What causes HSP?
Etiology unknown, but often with antecedent bacterial or viral infection
Who is more often affected with HSP, boys or girls?
Boys
Which symptom is present in all cases of HSP, but may not be the first sign?
Palpable purpura (usually on lower extremities and buttocks)
What are the main symptoms of HSP?
- Palpable purpura
- Colicky abdominal pain
- Heme positive stools
- Renal disease
- Asthritis/arthralgia
What is often the cause of abdominal pain in HSP?
Intussuception
How does renal disease in HSP present?
- Hematuria
- Proteinuria
- Azotemia
- HTN
What lab tests diagnose HSP?
None
What labs are suggestive of HSP in the right clinical scenario?
- Elevated BUN and creatinine
- Heme positive stool
- UA with hematuria