rhematology / renal Flashcards
juvenile idiopathic arthritis (pathophysiology, HLA, presentation)
- vascular endoth hyperplasia + cartilage erosion
- DR5/8
- Morning stiffness but pain later (no redness)
juvenile idiopathic arthritis - criteria
- less than 16 years 2. one or more joints, 3. more than 6 weeks 4. type by presentation in the first 6 months
- exclusion of other arthritis, vasculitis, and connect tis)
juvenile idiopathic arthritis - types and presentation
- pausiarticular: fewer than 5 joints, lower extremities (not hip), almost never upper
- polyarticular: 5 or more (large or small), like adults, Rheumatoid nobules (in severe) , may cervical
- systemic onset: visceral involvement, daily Q spikes (at least 39) for 2 or more wks, salmon migratory linear or circular rash (trank or extremities)
juvenile idiopathic arthritis - treatment
- NSAID 2. methotrexate (safest + most efficous 2nd line) 3. corticosteroids (overwhelming infl, systmemic illness, bridge treatment) 4. Opthalmol follow up
juvenile idiopathic arthritis - polyarticular - serology , major problems, outcome
- RF(+): older gitls, hand + wrist erosions, unremitting nodules –> poor
- ANA(+) –> younger girls –> good
- seronegatice –> variable prognosis
juvenile idiopathic arthritis - pauciarticular- serology , major problems, outcome
- RF(+): erosion + unremitting nodules –> poor
- ANA (+) –> younger girls, chronic iridocyclitis –> excelent (except eyes)
- HLAB27 –> older males –> good
- Sero (-) –> good
juvenile idiopathic arthritis - systemic - serology , major problems, outcome
pauciarticular –> good
polyarticular –> poor
SLE - HLA/age/sex/treatment
- HLA B8, DR2, DR3
- onset before age 8 is unusual / females
- NSAID (if no renal), methotrexate, biological drugs, anticoagulation in trombosis, steroids for kidney, cyclophosphamide for severe
pregnant woman with SLE
transfer IgG (usually anti-Ro) across placenta at 12-16 weeks –> variety of manifestations –> most important is congenital heart block –> all terminal except heart (permanent pacing)
Leading cause of acquired heart disease in US + japan / age of onset
Kawasaki (20% develop coron ar abnorm without treatment) / 80 are under 5 years old
Kawasaki - diagnostic criteria
- fever for 5 or more days nor improved with ibuprofen or acetaminophen + 4 the the following 5
1. not exudative conjuctivitis (bilateral)
2. rash (polymorphous non-vesicular) (diapered children may have perineal desquamation)
3. edema (or erythema of hands or feet)
4. adenopathy (cervical, often unilateral, 1.5 cm or more)
5. mucosal involvement (intraoral erythema, strawberry tongue, dry + cracked lips)
Kawasaki - other findings / cardiac findings?
irritability, asseptic mening, diarrhea, hepatitis, hydrops of gallbladder, urethritis, otitis media, arhtritis
Kawasaki - heart?
early myocarditis (50%) with tachycardia + decreased ventr function, pericariditis, coronary aneyrysm (2nd to 3rd week no evidence of long term hear disease if not coronary abnormalities within 2 months
Kawasaki - treatment + management
acute: IV globulin + high dose aspirin sabacute phase (no fever) low dose aspirin (3-5 mg/kg/day. Inf vaccine if in winter (Reye) management: 2D echo, repeat at 3 wks + if normal at 7 wks. Also ecg + follow platelets
Kawasaki - labs
normal to increased wbc, increased ESR, anemia (chronic disease), STERILE pyuria, hepatic transaminases, CSF pleocytosis,
platelets: high/normal in wk 1, significant increase in 2-3 wk (more than a million)
MCC of of nonthrombocytopenic purpura in children? / mechanism / epidimiology / definitive diagnosis
Henoch-Schonlein purpura
IgA - mediated vasculitis of small vessels (IgA + C3)
males , 2-8, winter / definitive diagnosis by skin biopsy
Henoch-Schonlein purpura - hallmark presentation
pink, maculopapular rash below waist, progress to peteechiae + purpura (red –> purple, rusty brown) crops over 3-10 days (at times in intervals up to 3-4 months)
Henoch-Schonlein purpura - labs
increased platelets, wbcs, ESR, IgA, IgM, anemia
urine RBCs, wbc, casts, albumin
anticardiolipin or antiphospolipids antibodies
Henoch-Schonlein purpura - treatment
- symptomatic for self limited
- steroids (oral or IV) in intestinal complications (dramatic improvement)
- same treatment for any renal disease if its involved
Henoch-Schonlein purpura - complications
- renal insufficiency/failure (less than 1% insufficiency
- -> less than 0.1% to failure) - bowel perforation
- scrotal edema
- testicular torsion
risk factors for urinary tract infection
female: wiping, sex, pregnancy
male: uncircumcised
both: vesicoulateral reflux, toilet-training, constipation, anatopic abnormalities
diagnosis for UTI
- urine culture (gold standard) 2. UA findings
need a proper sample (if toiled trained midstream collection)
possitive if more tan 50.000 (single pathogen) + pyuria
UTI treatment + follow up
cystitis: amoxicillin, TMP-SXM, nitrofurantoin
pyelon: oral antibiotics, unless hospitalization
follow up: urine culture in 1 wk after stopping antibiotics –> periodic reassessment for next 1-2 years
- US and cysteourethrogram in reccurent or other complications
vesiculateral reflex - pathogenesis / results
occurs when submucosal tunnel between mucosa + detrusor muscle is short or absent
- pyelonephritis –> scarring –> reflux neuropathy (hypertension, proteinria, end stage)
vesiculateral reflex - grading
- urine reflex into nondilated ureter (anyone)
- upper collecting system without dilation
- mild to moderate dilation of pelvis + ureter
- moderate dilation of ureter +/- tortuosity of ureter
- severe dilation + tortuosity of ureter, pelvis, calyces
vesiculateral reflex - diagnosis
VCUG for diagnosis + grading
renal scan for renal size, scarring + function (if scarring, follow creatinine
vesiculateral reflex - natural history
- increased scar in grade 5 (less with bilateral 5)
- majority of 1-4 regress (regardless age or uni/bilateral)
- tendency to resolve (6-7 years) (lower grade –> better chances)
vesiculateral reflex - treatment
- medical: based on reflux resolving
- careful monitoring for UTIs
- surgery if: medical fails, scar, worsening on VCUG or renal scan
Obstructive uropathy - clinical presentation
- hydronephrosis 2. upper abd or flank pain
- recurrent UTI 4. weak + decreased urinary stream
- failure to thrive 6. diarrhea 7. other non-specific
MCC of abd mass in newborns (and also other causes)
- hydronephrosis ureteropelvic junction obstruction
2. multcystic kidney disease
obstructive uropathy - diagnosis
- palpable abd mass
- US (prenatally)
- VGUG (in all congenital hydronehrosis + iin any dilation –> to rule out posterior urethral valves)
obstructive uropathy - common etiologies
- ureteropelic junction obstruction (MC, uni or bilateral)
- ectopic ureter (drains outsied bladder –> incontinence + UTIs)
- ureterocele (mostly girls)
- posterior urethral valves (mostly boys)
posterior urethral valves - characteristics
- MCC of severe obstructive uropathy
- mostly in boys
- can lead to end stage renal disease
- mild hydronephrosis to severe renal dysplasias
- palpable bladder and weak urinary stream
obstructive uropathy - diagnosis / treatment / complication
- diagnosis: VCUG complication: Potter disease (lung)
- treatment: decompress bladder with catheter, antibiotic (iv), transurethral ablation or vesicostomy
acute poststreptococcal glomerulonephritis - follows (and when) / complement activation through / symptoms
- follows: sore throat in cold weather (after 1-2 wks) or skin in warm (after 3-6 wks)
- alternative pathway
- classic triad: edema, hypertension, hematuria
acute poststreptococcal glomerulonephritis - diagnosis
- urianalysis (RBC casts, polymorphonuclear, protein),
- mild anemia (hemodilation + low hemolysis)
- low C3 (normal in 7wks)
- positive throat culture or increased antibodies to strep antigens
- biopsy if: ARF, nephrotic, more than 2 months, absence of strep, normal Complement
acute poststreptococcal glomerulonephritis - complications + treatment
- hypertension, ARF, CHF, electr abn, acidosis, seizures
- penicillin for 10d, sodium restriction, diuresis, fluid + elctr manegment, control hypertension
MC chronic glomerular disease worldwide - name/clinical presentation / treatment
- Berger disease (IgA nephropathy)
- Gross hematuria
- associated with URI or GI infection
- NORMAL C3
treatment: control hypertension