UWORLD STEP 2 CK USMLE REAL STUDY GUIDE WITH 900
COMPLETE TERMS WELL ANSWERED RATED 5 STAR WITH
COMPLETE SOLUTIONS GUARANTEED PASS 2024-2025
Congenital dermal Melo cytosis, benign, flat blue-grey patches on the
lower back and buttocks that is common in African, Asian, Hispanic,
and Native American ethnicity.
Mongolian spots -> usually fade spontaneously
-> document these as they can be mistaken for bruises
What is the most common cause of acute, unilateral lymphadenitis in
children?
Staph aureus followed by group A strep
Pts w/ bacterial lymphadenitis usually < 5 y/o and nontoxic, tender lymph
node, warm, erythematous, 3-6 cm in size Unilateral acute cervical
lymphadenitis
All sexually active women < 24 should undergo which screening?
Chlamydia trachomatis and Neisseria gonorrhoea
-> recommended for any person with new partner in past 2 mo., multiple
partners, history STI, illicit drug use, incarceration, contact with sex workers
-> cervicitis asymptomatic often can lead to PID -> infertility, ectopic
pregnancy, chronic pelvic pain
,Best screening test for Chlamydia trachomatis and Neisseria
gonorrhoeae by?
Nucleic acid amplification testing which has high sensitivity and
specificity
-> can be done urine, endocervical, vaginal, or urethral specimens
Can sit momentarily on propped hands, transfer objects from hand to
hand, and respond to name. Stranger anxiety develops at this age.
healthy 6 mo. old
Pts with Sickle cell anemia suffer from chronic extravascular and
intravascular hemolysis. Characteristic lab findings include?
Mild to moderate anemia w/ reticulocytosis + unconjugated
hyperbilirubinemia, INC lactate dehydrogenase, low to absent serum
haptoglobin
-> Acute worsening of anemia can occur from splenic sequestration with
manifests as splenomegaly and INC fatigue
___ are the antibiotics of choice for pertussis treatment and post-
exposure prophylaxis. All close contacts should be given this
antibiotic regardless of age, immunization status or symptoms.
Macrolides
Age < 1 mo. = Azithromycin 5 days
Age > 1 mo. = Azithromycin x 5 days/Clarithromycin x 7 days/ Erythromycin
x 14 days
,Lethargy, fever, poor oral intake, vomiting presentation, nuchal
rigidity of bacterial meningitis in infant what should be performed
next?
Lumbar puncture before antibiotics
Infants critically ill (status epilepticus, septic shock) antibiotics before
lumbar puncture
Head CT -> comatose infants
Indications for imaging prior to LP for bacterial meningitis suspected
in children > 1 mo.
Hx hydrocephalus or neurosurgical procedure
Hx head trauma
Coma or focal neuro findings
Tx Bacterial meningitis in children age > 1 mo.
IV Vanco & Ceftriaxone
OR
Cefotaxime
Dexamethasone for H. influenzae type b meningitis
Fever, toxicity, gray-white pharyngitis, sandpaper-like rash,
circumoral pallor.
, Scarlet fever -> strawberry tongue
Group A strep erythrogenic exotoxin
tx: Penicillin V
What is herpangina?
Throat infection caused by enteroviruses such as Cox A, high fever, sore
throat complete inability to swallow, ulcerative lesions palate, tonsils,
pharynx
palms and sole rash, hand-foot-mouth disease
The most important risk factors for respiratory distress syndrome
(RDS) is?
Prematurity
-> male sex, prenatal asphyxia, maternal diabetes, cesarean section
Maternal diabetes -> INC incidence by delaying maturation of pulmonary
surfactant production (high levels insulin in fetus inhibits cortisol and blocks
maturation sphingomyelin)
Tx RDS
Antenatal prevention w/ corticosteroids and postnatal tx w/
exogenous surfactant
Space occupying lesion in the parietal lobe in a child what is the most
common tumor type?
CNS tumors most common solid tumors => Astrocytoma most common
supratentorial and infratentorial groups
In pediatric population, infratentorial tumors are more common than
