Boards Flashcards
What are the signs of an uncal (temporal lobe) herniation?
- blown unilateral pupil (due to CN III compression)
- contralateral paresis
- usually secondary to trauma
What is the optimal starting dose of levothyroxine for congenital hypothyroidism? When should it be started?
10-15 micrograms/kg per day; start before 2 weeks of age for best outcomes
True or false: Prior BCG vaccine can cause a false positive TB skin test.
True-but response usually wanes so this should be
True or false: The quantiferon gold test result is affected by prior BCG vaccines.
False– prior BCG vaccine does NOT react
What is the most common cause of acute ataxia in children?
Ingestion (should have altered mental status)
If normal mental status -> consider acute cerebellar ataxia (usu post-viral)
symptoms of acute cerebellar ataxia usually resolve in weeks to months and rarely recur
What is the classic presentation for an infant with transposition of the great arteries?
Severe cyanosis within the first few hours of life WITHOUT respiratory distress
If you put the baby in a 100% oxygen hood the cyanosis will not correct
Look for low PaO2 on arterial gas
Need to give PGE
How do you distinguish PPHN and cyanotic heart disease in the neonate?
- hyperoxia test (100% O2 in hood)
- If it fails to correct cyanosis and O2 remains low -> cyanotic heart disease, also low PaO2 on art gas
- If it corrects with O2 -> PPHN
What is the most common renal tumor in childhood? What are the presenting signs?
=Wilms tumor
-painless abdominal mass, hypertension, and hematuria
What diagnosis should be considered in a skeletally immature child with negative xrays with point tenderness pain (ex over lateral ankle)?
=fracture of the growth plate (physis, type I salter harris fracture)
-generally heal with 4-6 weeks of immobilization
True or false: an optimally treated (ie diet managed) child with PKU will not have any sequelae
False
- Risk of longterm neurocognitive effects (attention, EF, processing speed)
- Diet makes risk for micronutrient deficiencies and disrupted bone metabolism -> increased risk of osteopenia and osteoporosis
- Still risk for teratogenesis even with strict maternal adherence during pregnancy
You note a bifid uvula on exam. What two commonly associated problems do you need to evaluate for?
- Submucous cleft palate (notching of the posterior hard palate, bifid uvula, diastasis of the muscles of the soft palate)
- Middle ear effusions and conductive hearing loss
- hx of recurrent ear infections
- presence of effusion on exam
- speech concerns
What is the time to onset of SABAs (ex albuterol)? Duration of action?
Onset: 15 minutes
Duration: 4-6 hours
What is time of onset of LABAs (ex salmeterol, formoterol)? Duration of action?
Onset: 15-30 minutes
Duration: 12 hours
Regular use of LABAs and SABAs can lead to decreased bronchoprotective effect.
True or false: ERCP should be performed during a suspected episode of acute pancreatitis secondary to a gallstone
False–invasive procedure, risk of worsening the pancreatitis
Try to confirm presence of gallstone (ie MRCP) before intervening and let pancreas cool off a bit
Low calcium with a elevated PTH represents ______
=pseudohypoparathyroidism
- due to resistance to PTH
- Can have resistance of other endocrine hormones (ex TSH)
- look for Albright’s hereditary osteodystrophy phenotype (if after 5 years, short, fat, brachydactyly)
Warm agglutinins (in autoimmune hemolytic anemia) are IgG or IgM based? What are some causes?
warm agglutinins=IgG based
-causes: infectious (younger children), antibiotics
Cold agglutinins (in autoimmune hemolytic anemia) are IgG or IgM based? What is a type of infection in pediatrics associated with this?
cold agglutinins=IgM based
-associated with mycoplasma infections
What does a Coombs or DAT test detect?
antibodies or complement proteins bound tot he surface of erythrocytes
RBCs are washed of normal plasma proteins, then incubated at 37 degrees (warm) with the Coombs reagent which contains a protein that will bind to the human gamma globulin and complement. If these autoantibodies are present on the surface, it binds and then causes agglutination (clumping) of the RBCs. Follow-up testing is then done to determine the type of autoantibody vs complement that was bound to the RBCs
A positive DAT should make you consider ________.
Autoimmune hemolytic anemia (esp warm)
Name the toxidrome with the following symptoms:
- hyperpyrexia
- hypertension
- tachycardia
- dry mucus membranes
- flushed skin
- mydriasis
- decreased bowel sounds
- confusion
=anti-cholinergic
What are some classes of medications associated with anti-cholinergic properties?
- antihistamines
- TCA anti-depressants
- OTC cold and sleep aids
- atropine
- scopolamine
- contaminated street drugs
* Jimson weed
Define metatarsus adductus. What is the most common cause?
=congenital foot deformity characteristized by medial deviation (adduction) of the forefoot relative to the hindfoot.
-in mild or moderate cases you can correct it with stretching
Most commonly caused by intrauterine molding
How is metatarsus adductus treated?
- usually stretching by parents, usually within 4-6 months
- serial casting is used for patients with more severe or rigid deformities that cannot be passively abducted to midline
True or false: skin prick testing is superior to serum based RAST testing.
=FALSE
-use of serum-specific IgE testing is comparable
True or false: a positive skin prick test tells you the child is allergic to the item in question.
=FALSE
-it only tells you the child is sensitized. The presence of symptoms on exposure to the item in question in the setting of a positive skin prick indicates an allergy
Define femoral anteversion. Describes its common features.
=femoral neck is rotated anterior compared to the axis of the knee and the femur.
- medially facing patella
- intoeing
- increased internal hip rotation when prone
- “egg beater” running gait
What is the natural history of femoral anteversion? When is orthopedic referral indicated?
Most spontaneously improved with time by skeletal maturity, usually by age 7 years
Refer to orthopedics when anteversion persists beyond age 11 years or is unilateral
What is the most common complication of an aspirated foreign body?
=pulmonary infection (especially when presentation is delayed)
What is the most common long-term manifestation of congenital toxoplasmosis infection? Congenital CMV?
toxoplasmosis =visual loss (secondary to chorioretinitis)
CMV=hearing loss
True or false: ANA can be positive in up to 1/3 of the healthy population and may occur in family members of patients with autoimmune disease.
=True
- it is not associated with autoimmune disease in setting of a normal examination
- it is not predictive of developing autoimmune disease in the future.
True or false: The ANA can only be positive in the setting of rheumatologic autoimmune conditions.
False
-infections (TB, osteomyelitis, lyme disease, viral infections) and other conditions (DM, psoriasis, ITP, autoimmune hepatitis, MS, type I DM, lymphoma, leukemia) can cause elevated ANA
True or false: kids with PE tube otorrhea can be treated with only topical antibiotics.
False–oral or topical antibiotics–same pathogens that are responsible for AOM cause PE tube otorrhea
-Oral antibiotics indicated for
A history of an indwelling cathether put you at risk for a UTI due to what organism?
enterococcus
- suspect when UA negative for nitrites
- Need ampicillin + 3rd generation cephalosporin or gentamicin
True or false: fever is an absolute contra-indication for sports participation
true
Define transient erythroblastopenia of childhood. Who gets it?
- Transient aplasia of RBCs that leads to a normocytic/macrocytic anemia and low reticulocyte count (b/c of hypoproliferation)
- usually seen in children 1-4 years old after viral infection
- Tends to present with typical signs of anemia
- Usually self resolves, but will need to follow CBC, retic count weekly until it resolves
- Usually not associated with abnormalities in other cell lines
- Differential diagnosis Diamond-Blackfan anemia (look for congenital anomalies, more severe anemia, onset
Do all children with corneal abrasions need ophthalmology follow-up?
No; usually small abrasions heal in 48-72 hrs
- If persistent symptoms after 3 days -> refer
- If child wears contact lenses or a large abrasion -> immediately refer
A child has persistent moderate-severe atopic dermatitis despite optimal management. What should you do?
Refer for testing for food allergies
A flank mass, hematuria, and thrombyoctyopenia in a newborn suggest _____.
renal vein thrombosis
What is the treatment of choice for chlamydia pneumonia in a neonate?
=erythromycin
What are the 4 most common causes of rectal bleeding in a child
- anal fissure
- milk protein colitis
- NEC
- swallowed blood
What is the definition of neutropenia in an infant 2 months to 1 year old? What is considered severe neutropenia?
Neutropenia =2 months -1 year: ANC
True or false: severe congenital neutropenia is NOT associated with an increased risk for malignant tumors.
FALSE
True or false: boys with hemophilia A should avoid intramuscular injections, activities with high risk for blows to the head, aspirin or NSAIDs.
True
True or false: you can proceed with circumcision of a male infant born to a mother who is a known carrier of factor VIII deficiency.
False–delay until diagnosis is confirmed–child at 50% risk of having the disorder and may have clinically significant bleeding.
What is the recommended management for a black widow spider bite?
- Cleaning the wound
- Analgesics
- Up to date tetanus shot
Who should receive anti-venom for a black widow spider bite?
-young children with a confirmed bite and symptoms of moderate to severe envenomation
Define meningococcemia. What is the associated organism?
=disseminated meningococci in the bloodstream due to Neisseria meningitides infection
-can present with: 1) meningitis 2) meningitis+bacteremia, 3) bacteremia without meningitis
What is the strongest risk factor associated with mortality due to meningococcemia?
-young age
What is the treatment of choice once N. meninigitidis diagnosis is confirmed
High dose IV penicillin G for 5-7 days
How long can dysfunctional uterine bleeding due to anovulatory cycles last?
2 years post-menarche
After 2 years after menarche, need to investigate for other causes (ex PCOS)
Name 3 complications of a basilar skull fracture.
Basilar skull fracture=fracture in 1 of the 5 bones that make up the skull
Complications:
- CSF leak (usually resolved within a week with no tx, increased risk 5% for meningitis but abx do NOT prevent this)
- Hearing loss
- Cranial nerve dysfunction
Is the weakness/paralysis in infantile botulism ascending or descending?
descending
How is a diagnosis of infantile botulism made?
identification of the botulinum toxin in stool specimen
What is the treatment of infantile botulism?
- supportive care
2. human botulism immune globulin given early in the disease can be beneficial
What is Osgood-Schlatter disease?
=irritation of the tibial tubercle apophysis
-repetitive quadriceps muscle contraction through the patellar tendon at its insertion provides traction and tension on the skeletally immature tibial tubercle resulting in microavulsions
What is an aphophysis?
=Minor growth plate or secondary center of ossification that are located where tendons attach to bone
What is the treatment for Osgood-Schlatter disease?
- Support care–patellar strap, rest, quadriceps stretching, ice and NSAIDs
- activity as tolerated , most can continue to participate in sports
Infants that develop progressive weakness, plateau of motor skills, visual dysfunction, exaggerated startle response, think of ________.
- Tay Sachs
- cherry red spots (often at time of dx no hepatosplenomegaly vs infantile Gaucher or Niemann Pick
- hexosaminidase deficiency
- No enzyme replacement available currently