Pediatrics

Emergency medical services transport a 14-month-old male toddler to the hospital following an acute episode of respiratory distress. The parents report that two hours prior to arrival, the child experienced an abrupt, violent choking spell while playing unsupervised in his older sibling's bedroom. The initial severe coughing subsided, but a persistent, noisy breathing pattern developed immediately afterward. He has been previously healthy with no recent history of fever, rhinorrhea, or diagnosed pulmonary conditions. Vital signs upon arrival include a temperature of 37.0°C (98.6°F), a heart rate of 142/min, a respiratory rate of 48/min, and an oxygen saturation of 94% on ambient air. Physical examination shows a conscious, alert child with mild subcostal retractions. Chest auscultation identifies noticeably decreased air entry over the right hemithorax, accompanied by a focal monophonic wheeze during expiration. An expiratory chest radiograph reveals asymmetric hyperlucency of the right lung alongside a leftward deviation of the mediastinum. Which of the following is the most appropriate next step in the management of this patient?

A 10-month-old boy is brought to the pediatric clinic by his parents due to a new-onset skin eruption. For the past three days, the infant experienced a high fever, with home temperature readings reaching up to 39.8°C (103.6°F). Despite the elevated temperature, he remained playful and continued to breastfeed normally. Early this morning, the fever abruptly resolved. A few hours later, the parents noticed a pink, blanching, maculopapular rash that began on his chest and abdomen before spreading to his neck and proximal extremities. His only other symptom is mild, clear rhinorrhea. He has received all age-appropriate vaccinations up to his 6-month well-child visit. His current temperature is 37.1°C (98.8°F), pulse is 110/min, and respiratory rate is 24/min. Physical examination confirms the maculopapular exanthem and reveals mild suboccipital lymphadenopathy. Lung auscultation is clear bilaterally. Which of the following is the most appropriate next step in management?

Evaluate the following neonatal clinical scenarios and match each patient's presentation with the most appropriate targeted pharmacologic therapy or initial management strategy.

Review the following distinct clinical presentations of pediatric genetic syndromes. Match each patient's phenotypic description with the most appropriate underlying diagnosis.

A 3-year-old girl is brought to the pediatric emergency department due to high fever, worsening cough, and difficulty breathing. She had a mild runny nose and cough for 3 days, but today her temperature spiked to 39.4°C (102.9°F) and her work of breathing increased significantly. She has vomited all oral intake over the past 12 hours. Her past medical history is unremarkable, and she is up to date with all childhood immunizations, including the pneumococcal conjugate and Haemophilus influenzae type b vaccines. Vital signs show a heart rate of 155/min, respiratory rate of 52/min, blood pressure of 92/60 mmHg, and oxygen saturation of 90% on room air. Physical examination reveals a moderately ill-appearing child with nasal flaring and subcostal retractions. Auscultation of the lungs demonstrates decreased breath sounds and focal crackles over the right lower lung field. A chest radiograph reveals a dense right lower lobe consolidation with a small, simple parapneumonic effusion. The patient is admitted to the pediatric ward and placed on supplemental oxygen. Which of the following is the most appropriate empiric pharmacotherapy for this patient?

A 29-week gestation female neonate develops grunting, nasal flaring, and intercostal retractions shortly after birth. She is diagnosed with Neonatal Respiratory Distress Syndrome (RDS). Arrange the following pathophysiologic events in the correct chronological sequence that ultimately leads to the classic histopathologic findings of this condition.

Emergency medical services transport a 15-month-old girl to the emergency department following a sudden episode of severe choking and coughing. The babysitter reports the child was playing near a coffee table with a bowl of mixed nuts when the event occurred. The acute coughing fit has now subsided. Her vital signs show a temperature of 37.0°C (98.6°F), a heart rate of 128/min, a respiratory rate of 34/min, and an oxygen saturation of 97% on room air. Auscultation of the lungs reveals noticeably decreased air entry and a distinct expiratory wheeze localized to the right lower lung field. An expiratory chest radiograph displays hyperinflation of the right lung alongside a mild shift of the mediastinum toward the left. Which of the following is the most appropriate next step in the management of this patient?

Parents bring their $6$-month-old daughter to the acute care clinic due to episodes of profound sweating, vomiting, and unresponsiveness. According to the parents, the infant was entirely asymptomatic during her first few months of life while being exclusively breastfed. However, following the introduction of fruit purees and apple juice three weeks ago, she began having these episodes shortly after feeding. Vital signs include a heart rate of $152$/min and a respiratory rate of $42$/min. Physical examination demonstrates a pale, difficult-to-arouse infant with marked hepatomegaly.

Which of the following is the most likely underlying biochemical defect in this patient?

A father brings his 14-month-old daughter to the primary care clinic because she has been unusually irritable and consistently rubbing her ears for the past two days. She developed a clear nasal discharge and a mild cough earlier in the week. Her temperature in the clinic is 38.6°C (101.5°F), heart rate is 130/min, and respiratory rate is 28/min. She has not been exposed to any known sick contacts outside the home, does not attend daycare, and has no history of medication allergies. Her last course of antibiotics was prescribed at age 4 months for a localized skin infection. On physical examination, she appears fussy but consolable. Otoscopy reveals that both tympanic membranes are bulging, vividly erythematous, and lack mobility upon pneumatic insufflation. The lungs are clear to auscultation bilaterally. Which of the following is the most appropriate initial treatment for this patient?

Match each neonatal clinical presentation of hyperbilirubinemia to its most likely underlying etiology.

Match each classic pediatric respiratory clinical presentation (left) with its most likely causative microbiologic agent (right).

A 24-hour-old term male neonate is evaluated in the nursery for rapidly progressing jaundice. He was born via uncomplicated vaginal delivery at 39 weeks gestation to a mother with blood type O, Rh-positive. His birth weight was $3400\text{ g}$. APGAR scores were 8 and 9 at 1 and 5 minutes, respectively. The infant's blood type is A, Rh-positive, and his direct antiglobulin test (DAT) is strongly positive. He is currently vigorous and feeding well with breast milk. His temperature is $37.0^\circ\text{C}$ ($98.6^\circ\text{F}$), heart rate is $145\text{/min}$, and respiratory rate is $42\text{/min}$. Arrange the following interventions in the most appropriate escalating sequence for the management of this patient's condition, assuming continued clinical deterioration and refractoriness to each preceding therapy.

A $12$-day-old male neonate, born prematurely at $29$ weeks gestation, is being evaluated in the neonatal intensive care unit for acute clinical deterioration. His birth weight was $1,150\text{ g}$. Apgar scores were $6$ and $8$ at $1$ and $5$ minutes, respectively. Over the past week, he has been gradually transitioning to full enteral feeds via an orogastric tube. Over the last $8$ hours, the nursing staff has noted increased gastric residuals, new-onset lethargy, and one episode of bilious emesis.

Current vital signs are:
Temperature: $35.6^\circ\text{C}$ ($96.1^\circ\text{F}$)
Heart rate: $178\text{ /min}$
Respiratory rate: $65\text{ /min}$
Blood pressure: $48/28\text{ mm Hg}$

On physical examination, the neonate appears mottled and lethargic. The abdomen is tensely distended, tender to palpation, and exhibits fixed overlying erythema. Bowel sounds are absent.

Laboratory evaluation reveals the following:

A plain anteroposterior abdominal radiograph demonstrates dilated bowel loops, intramural air (pneumatosis intestinalis), and branching lucencies over the hepatic shadow. There is no free intraperitoneal air observed.

Which of the following is the most appropriate next step in management?

Match each clinical presentation of a neonatal cranial birth injury to the most appropriate diagnosis.

Routine rounding in the normal newborn nursery involves the examination of a 48-hour-old full-term neonate. The pregnancy was uncomplicated, and maternal group B Streptococcus screening was negative. The neonate is feeding well and has not had any documented fevers. However, the parents are highly anxious about a new, widespread skin eruption that appeared earlier this morning. Physical examination reveals multiple 2- to 3-mm pale yellow pustules surrounded by a prominent erythematous base, distributed over the chest, abdomen, and proximal extremities. The palms and soles are completely spared. Vital signs, including temperature, are within normal physiological limits for age. Which of the following is the most appropriate next step in the management of this patient?

A 4-day-old male neonate is evaluated in the neonatal intensive care unit. He was delivered vaginally at 39 weeks of gestation to a 26-year-old primigravida. Birth weight was $3400\text{ g}$. APGAR scores were 8 and 9 at 1 and 5 minutes, respectively. At $48\text{ hours}$ of life, he developed temperature instability, poor feeding, and lethargy. A full sepsis evaluation was performed, and empiric intravenous ampicillin and gentamicin were initiated. Current vital signs are temperature $37.1^\circ\text{C}$ ($98.8^\circ\text{F}$), heart rate $140/\text{min}$, and respiratory rate $42/\text{min}$ on room air.

Blood cultures obtained at symptom onset now demonstrate robust growth of *Streptococcus agalactiae* (Group B Streptococcus) that is exquisitely sensitive to penicillin G. Cerebrospinal fluid analysis is unrevealing. Physical examination today reveals an alert infant with a new scattering of erythematous macules containing central tiny yellow papules on the anterior chest, lacking any surrounding induration.

Laboratory studies drawn this morning show:

During bedside rounds, the mother expresses profound anger upon learning that her positive maternal Group B Streptococcus screening results were not transmitted from her outpatient clinic to the hospital during admission. She demands that the specific administrative staff member responsible for the omission face immediate disciplinary action.

Which of the following is the most appropriate management plan for this patient?

Match each pediatric patient's clinical presentation of lymphadenopathy with the most likely causative infectious organism.

A 9-year-old boy is brought to the pediatrics clinic by his father due to a persistent cough for the past two weeks. The cough is dry, nonproductive, and frequently disrupts the patient's sleep. Over the past few days, he has also developed a mild sore throat, malaise, and a low-grade fever. His past medical history is unremarkable, and his immunizations are up to date. His temperature is 37.9°C (100.2°F), blood pressure is 105/65 mm Hg, pulse is 95/min, and respiratory rate is 22/min. Pulse oximetry shows 98% on room air. The patient appears comfortable and is in no acute distress. Physical examination of the chest reveals diffuse, bilateral fine crackles and occasional expiratory wheezes. A chest radiograph demonstrates bilateral, patchy interstitial infiltrates without pleural effusions or focal lobar consolidation. What is the most appropriate next step in management?

A $5$-month-old girl is brought to the outpatient clinic in late December due to a $3$-day history of nasal congestion, copious clear rhinorrhea, and a worsening cough. Her oral intake has decreased slightly, but she continues to have wet diapers. During the visit, her mother expresses concern that the infant is not yet able to sit up without support. The patient was born at full term and has received all age-appropriate vaccinations. Her temperature is $37.9^\circ\text{C}$ ($100.2^\circ\text{F}$), pulse is $148/\text{min}$, respirations are $58/\text{min}$, and pulse oximetry shows $95\%$ on room air. Physical examination reveals mild subcostal retractions. Auscultation of the lungs demonstrates diffuse bilateral wheezing and scattered crackles. Which of the following is the most appropriate next step in management?

An $8$-year-old boy is brought to the emergency department due to a $2$-day history of worsening headache, high fever, and generalized lethargy. Over the last $12$ hours, he has become increasingly difficult to arouse. His temperature is $39.4^\circ\text{C}$ ($102.9^\circ\text{F}$), blood pressure is $110/70\text{ mmHg}$, pulse is $125/\text{min}$, and respiratory rate is $22/\text{min}$. Physical examination reveals a somnolent child who only opens his eyes to painful stimuli. He has marked nuchal rigidity. Funduscopic examination shows bilateral blurring of the optic disc margins. There are no focal neurologic deficits or purpuric rashes. Arrange the following steps in the most appropriate sequential order for managing this patient's acute presentation.