MedStudy Flashcards
TSC Brain Changes
Cortical and periventricular calcifications
Sturge Weber Brain Changes
Unilateral serpiginous parenchymal calcifications with hemispheric atrophy
NF1 Brain Changes
Hyperintensity areas in basal ganglia and cerebellum
Vestibular schwannomas symptoms
NF2, 8th cranial nerve
tinnitus, unsteady gait, hearing loss, and/or facial weakness
NF2 can have bilateral cataracts (subcapsular lenticular opacities)
Ascorbic acid deficiency
vit C
fragmented hair with corkscrew appearance
gingival hemorrhage, FTT, irritability, bone pain
ground glass appearance to bones, sharply outlined metaphyseal ends
Langerhans cell histiocytosis derm symptoms
scaly papular seborrheic dermatitis of the scalp and diaper area
Vitamin D deficient rickets XR findings
decreased bone mineralization around epiphyses and bowing of LE
widening of wrist and knees
enlarged costochondral junctions “rachitic rosary”
Caffey Disease
COL1A1
irritability, fever, anorexia, soft tissue swelling associated with subperiosteal cortical thickening of underlying bone
Average onset: 10 weeks - 6 months
Labs: leukocytosis, elevated ESR and Alk phos
Mandible is affected in 95% of cases
Symptoms usually resolve by 24-30 months of age
Choanal Atresia DDX
CHARGE
Treacher Collins - conductive hearing loss, hypoplasia of lower eyelids with lower eyelashes absent/coloboma, cleft lip/palate, mandibular hypoplasia -> respiratory issues 2/2 obstruction
Serotonin Syndrome vs NMS
Myoclonus!!!!
SSRI/MAOI/MDMA aka ecstasy/linezolid
Tachycardia, high temp, HTN, confusion, hallucinations
Ecstasy = bruxism and hyponatremia
Tx - supportive, benzo and cyproheptadine
Do not confuse with NMS - will have hard to control BP and HR with muscle rigidity, Tx with benzo, dantrolene, bromocriptine, amantadine
Ingestion with Bezoar
Salicylates
ASA
OTC cold Med
Anti diarrheal
Oil of wintergreen
Bismuth
Herbal preparations
Acetaminophen Toxicity
Toxicity is mediated by NAPQI (metabolite). It binds to glutathione and if liver levels are depleted, NAPQI causes cellular damage.
NAC is tx -> restores glutathione stores; give within 8 hours of ingestion.
Obtain level at 4 hours to plot on normogram. Activated charcoal can be given at 1-2 hours.
Stages of Acetaminophen Tox
Stage I: malaise, lethargy, N/V
Stage II: 24-72 hours; RUQ pain with lab evidence
Stage III: 72-96 hours; peak lab markers including fulminant hepatic failure and prolongation of prothrombin time; most die at this stage
Stage IV: death or recovery
ASA toxicity
metabolic acidosis and respiratory alkalosis
Causes shift of K into cells -> kidneys conserve K and dump H+ -> urine is acidic
Fluid loss causes hyper NA2+
Toxicity activates the medullary respiratory center -> increased RR and HR, fever, etc.
DDX Cough, Coryza, Conjunctivitis
Measles (rubeola virus): will have classic rash, Koplik spots on buccal mucosa 2-3 days before the rash; splenomegaly and lymphadenopathy are common; college student. Maculopapular rash starts 2-4 days after fever onset and spreads in cephalocaudal direction.
Adenovirus: palatine petechiar, pharygneal/tonsillar enlargement/erythema, periauricular lymphadenopathy; serotypes 3 and 7 most severe. May have sterile hemorrhagic cystitis, PNA, encephalitis, myocarditis, diarrhea. Also can have a Reye like syndrome with bronchoPNA, hepatic failure, seizures, disseminated coagulopathy with serotype 7.
Viruses with Aplastic Crisis
Parvo B19
CMV
EBV
Hepatic viruses
HIV
Bacterial Meningitis for <7 DOL
GBS
E coli
Listeria
Tx amp + cephalosporin (cefotaxmine)
Hypertrophic Pyloric Stenosis
Caused by erythromycin or other macrolides if <6 weeks of age
Can be given to an infant with Chlamydial conjunctivitis or PNA
Gentamycin Toxicity
Oto and nephrotoxic
Congenital Syphilis
Infants with Treponema pallidum can present with bony lesions including osteochondritis at the metaphyses and periostosis. Decreased bands of bony mineralization and focal areas of destruction. It is painful so most refuse to move the affects areas.
Cutaneous lesions of palms and soles, which are contagious if ulcerated
HSM
Jaundice
Coombs neg hemolytic anemia
> 2 years old presentation
Rhinitis -> saddle nose appearance
Mulberry molars
Hutchinson teeth
Frontal bossing
CN 8 deafness
Anterior bowing of the shins
Screen with VDRL or RPR -> confirm with FTA-ABS or MHA-TP
Congenital Toxoplasmosis
Chorioretinitis, microcephaly, diffuse intracranial calcifications, seizures, hearing loss, growth restriction
Ineffective terminal complement cascade infections
C5-9 not working well
Neisseria meningitis and meningococcal infections
Tx: MCV4/Menactra if 9 months or older and they do not have asplenia or HIV
Menveo - give at 2/4/6/and 12 months
Boosters of either given q5 years
Bloody, watery diarrhea + Vulvovaginitis Infection
Shigella
Tx: ceftriaxone
Varicella Embryopathy
VZV infxn before 20 weeks GA
Severe limb malformations including shortening, atrophic, scarring in zig zag pattern
Ocular abnormalities - microphthalmia, cataracts, chorioretinitis, optic atrophy
TCA Toxicity
Prolonged QRS/PR/QT -> heart block. ventricular arrhythmias, PVCs, sinus tachy
Hypotension, shock, respiratory depression, seizures. coma
Can have anticholinergic symptoms
Symptoms can present up to 6 hours later
Tx: immediate activated charcoal if reliable airway, gastric lavage with intubation regardless of airway, and alkalization of serum via sodium bicarb to prevent arrhythmias
Monitor ECG 6-8 hours, but if having cardiac symptoms need to monitor 24 hours after no more abnormal patterns
Ex. amitryptilline, imipramine, doxepin
SSRI Overdose
Serotonin syndrome - myoclonus and rigidity in LEs, tachy, HTN, sweating
Confusion, agitation, loss of urine/stool
Hyperreflexia, clonus, tremor
Combo of SSRI, opioid, CNS stimulants i.e. MDMA/ecstasy and dextromethorphan, triptans
TX: mostly supportive, but can give serotonin antagonist such as cyproheptadine; benzo and IVF resuscitation
Anti-psychotic Overdose
Dystonia and muscle spasticity, eye deviation, trismus, cannot swallow
Chlorpromazine, promethazine
Tx: IV benadryl or IV benzo
Ecstasy (MDMA)
Hyperthermia, sweating, SIADH -> may overcompensate and lead to hyponatremia
Confusion, anxiety, paranoid
Muscle spasticity, seizures -> rhabdo
Hepatotoxicity
Beta blocker toxicity tx
glucagon
Ca channel blocker toxicity tx
IV calcium
Ethylene glycol tox tx
fomepizole
Ex. methanol or ethylene glycol
Cholinesterase inhibiting pesticide tox tx
pralidoxime
Examples: organophosphates and carbamates
Cyanide poisoning
Amyl nitrate
Methemoglobinemia
caused by amyl nitrates, aerosols, benzocaine spray
Tx. Methylene blue
PCP
tachycardia, agitation, HTN
hallucinations
NYSTAGMUS!! - lateral nystagmus can also be with benzo/barbituates
LE edema
Manic mood
Small but reactive pupils
Rhabdo can cause myoglinuria
ADHD med that can cause pinpoint pupils, decreased HR and RR
Clonidine
Malaria PPX
Chloroquine (rising resistance)
Doxycycline - daily tx + 28 days after trip
Atovaquone/Proguanil - daily + 7 days after trip
Mefloquine - weekly + 4 weeks post trip; not in Cambodia, Myanmar, or Thailand
Primaquine and tefenoquine - not in G6PD patients
Salmonella Tx
None unless high risk or severe disease aka hemoglobinopathies, malignancies, and chronic GI disorders only!
Azithromycin
Amox or Bactrim if susceptibility is known
Early onset (1st week of life) + FT infections vs. Late onset in FT
Early onset: Bacteremia/sepsis is most common followed by PNA and meningitis
Late onset: meningitis more common
If premature - more likely to be meningitis
Antibiotics for Meningitis before bacteria known
Vanc, ceftriaxone, metronidazole, and acyclovir (especially if viral vs. bacterial unknown)
Infants with Splenectomy/Asplenia and Vaccination
Menveo (MenACWY-CRM) at 2/4/6/12 months
Remember:
MenACWY-D (Menactra): ≥9 mos, avoid in those with asplenia or HIV
MenACWY-CRM (Menveo): ≥2 mos,
MenACWY-TT (MenQuadfi): ≥2years
Infant born to an HIV+ mother
ZDV (Zidovudine) for 4-6 weeks for ALL infants
PJP ppx with bactrim at 6 weeks of age 3x/week until negative infection is confirmed
Add 3 doses of nevirapine in the 1st week of life if Mom did not take antepartum meds or only received ZDV infusion during delivery (Usually when mom has viral load >1000 or unknown)
The biggest risk of vertical transmission is during delivery
Roth spots
Exudative, edematous, hemorrhagic lesions of the retina
associated with bacterial endocarditis
Suppurative thrombophlebitis
Usually dental infection with Fusobacterium
Can cause a septic embolus in the lungs
MIS-C
elevated troponin, BNP, LFTs, procal/ESR/CRP, triglycerides, ferritin
lymphocytopenia, neutrophilia
thrombocytopenia
Echo: depressed L ventricular function, pericardial effusion
Fever, maculopapular rash, mucus membrane changes, swollen hands and feet, headache, mental status changes
GI symptoms can mimic acute abdomen
Tx: IVIG, TNF inhibitors, IL-1 inhibitors, IL-6 inhibitors
EBV
Specific Ab panel - dx
Spot test - many false +
Morbilliform rash, petechial lesions at the junction of the hard and soft palate
Peripheral smear - foamy like cytoplasm
No strenuous exercise for 1-3 months; at least 4 weeks but not until splenomegaly resolves
Ab are only positive in 80% teens, 40% children, and 20% <4 years
Foreign Body Bacteria - Ring Abscess
B. cereus - esp contact lenses (Acanthamoeba is also associated with contact lenses, but no ring abscess)
Pseudomonas
Proteus
Discitis
narrowing of vertebrae spaces
fever, refusing to bend
ESR and CRP elevated, but WBC normal
Usually children <5 years
Ususally staph aureus
Hib
H flu type B
If infected child <2 years and not treated with ceftriaxone or cefotaxime then should be tx with dose of rifampin prior to discharge
If household contacts are not immunized or partially immunized and <2 years or anyone who is immunocompromised = rifampin
If day care contact, if >2 cases in 60 days and other children who are not immunized or partially, then need rifampin
Dose: 20 mg/kg/day or if <1 month 10 mg/kg/day
Arcanobacterium haemolyticum
aka diptheria (cornebacterium was old name)
fever, sore throat, pruritic/scarlatiniform rash that goes from extensor surfaces of extremities to the trunk, sparing the face, palms, and soles
Gram positive rod
Testing for C diff <1 year
Don’t. Many are colonized with c diff so testing will be a false positive
Parvovirus B19
Young children have slapped cheek fever with lacey rash
Adolescents and adults do not usually have a rash but arthritis without fever
Once the rash appears, they are no longer contagious
Boy who returned from lake vacation with very itchy vesicular rash initially on ankle and progressed to his whole calf
Ancyclostoma braziliense or Necator americanus aka hookworms
rash has serpentine pattern
Tx with albendazole or ivermectin
Conjunctival granuloma with preauricular lymphadenopathy, painless
Bartonella
Tx. azithromycin
Systemic disease: azithro + rifampin + gentamicin
Meningococcal ppx
Neisseria type B
Rifampin 10 mg/kg twice daily for 2 days > 1 month old, but 5 mg/kg BID for 2 days <1 month (oral)
Ciprofloxacin 500mg orally x1
Ceftriaxone 125mg if <15 years and 250mg >15 years IM once
Close contacts are those with contact < 7 days prior to onset, >8 hours prolonged contact, and <3 feet proximately
EBV Peripheral smear
Absolute lymphocytosis with >10% atypical lymphocytes
Child with pertussis and new baby in the family
give azithromycin 10mg/kg/day x 5 days to the newborn
Disorders that affect breastfeeding
HIV, HTLV1, HTLV2
Untreated TB - although can if on anti-TB therapy for 2+ weeks and considered non-infectious
Progressive hoarseness with wheezing, can have association with URI. Soft tissue irregularity at level of vocal cords
HPV
warts on vocal cords
can be wrongly dx as reactive airway disease
do not place trach
Mosquito bites in the summer causing encephalitis
Arbovirus
WNV also suspect if a bunch of birds died in one area
Posterior cervical and suboccipital lymphadenopathy, markedly injected pharynx, rhinitis, and blanching maculopapular rash on the trunk and upper thighs
Fine, discrete, irregular, pinkish-red macules located on the face and trunk
Rubella
Shallow painful ulcers in posterior pharynx, posterior cervical lymphadenopathy, cough, rhinitis
Herpangina (enterovirus aka coxsackie)
Exudative pharyngitis, anterior cervical lymphadenopathy, and diffuse red sandpaper rash
Scarlet fever/group A strep
May be described as a “fine” rash, spares the palms and soles
Strawberry tongue/beefy red tongue
Desquamation of skin 10-14 days after