Pediatrics

A 9-day-old male infant is brought to the pediatric emergency department by his parents due to a new rash on his head and decreased oral intake over the past 24 hours. The infant was born at 39 weeks gestation via vaginal delivery. Birth weight was 3,400 g (7 lb 8 oz) and APGAR scores were 8 and 9 at 1 and 5 minutes, respectively. Labor was complicated by fetal heart rate decelerations necessitating the placement of a fetal scalp electrode. Maternal group B Streptococcus screening was negative. Vital signs show a temperature of 38.1°C (100.6°F), heart rate of 165/min, and respiratory rate of 45/min. Physical examination reveals a cluster of 2- to 4-mm fluid-filled vesicles on an erythematous base located on the vertex of the scalp. The anterior fontanelle is flat, but the infant appears lethargic and is slow to respond to examination. Which of the following is the most appropriate next step in management?

Match each classic clinical presentation in a pediatric patient with its most likely causative pathogen.

A 15-month-old boy is evaluated in the pediatric clinic for a 3-day history of high fever, productive cough, and rapid breathing. His mother reports that he has been less active than usual but continues to drink fluids adequately. His medical history is unremarkable, though he missed his 12-month well-child visit because the family recently relocated. The mother expresses concern that he currently uses only about 5 distinct words, such as "mama," "dada," and "ball." She also asks if he can receive his missed vaccinations during today's visit.

Temperature is 39.1°C (102.4°F), heart rate is 148/min, and respiratory rate is 46/min. Blood pressure is 90/55 mm Hg, and oxygen saturation is 95% on room air.

Physical examination reveals an ill-appearing but consolable toddler. He walks independently around the examination room. Lung auscultation demonstrates localized crackles and decreased breath sounds over the right lower posterior lung field, with mild subcostal retractions. Cardiovascular examination is unremarkable.

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

A 39-week gestation neonate develops lethargy, poor feeding, and temperature instability (36.0°C) at 18 hours of life. The maternal history is significant for group B Streptococcus colonization with inadequate intrapartum antibiotic prophylaxis. Assuming the infant remains hemodynamically stable, arrange the following interventions in the correct chronological sequence for the diagnostic evaluation and management of this patient.

A 7-year-old girl is brought to the emergency department by her parents due to severe headache, high fever, and progressive confusion over the past 8 hours. Her temperature is 39.6°C (103.3°F), blood pressure is 105/65 mmHg, heart rate is 138/min, and respiratory rate is 24/min. On examination, she is lethargic, spontaneously opens her eyes only to pain, and utters incomprehensible sounds. Pronounced nuchal rigidity is present. Fundoscopic examination reveals bilateral blurring of the optic disc margins. The patient has no history of immunodeficiency and is up to date on all vaccinations. Arrange the following management steps in the most appropriate chronological order for this patient's acute presentation.

A pediatrician is examining several newborns in the nursery and noting various benign dermatologic findings. Connect the following neonatal clinical vignettes with their most appropriate diagnosis.

Correlate the following clinical descriptions of pediatric dermatologic findings and associated symptoms with their respective etiologic agents.

An 8-month-old female infant is evaluated at an urgent care clinic in mid-February due to difficulty breathing and poor feeding for the past 24 hours. Her parents report that she developed clear rhinorrhea, a mild cough, and a low-grade fever three days ago. She was born at 39 weeks gestation without complications. When asked about her development, the parents note she sits without support and transfers objects from hand to hand, but she is not yet able to pull herself to a stand. Her temperature is 38.1°C (100.6°F), pulse is 155/min, and respiratory rate is 58/min. Oxygen saturation is 95% on room air. Physical examination reveals a fussy infant with prominent subcostal retractions and nasal flaring. Lung auscultation demonstrates diffuse expiratory wheezing and scattered coarse crackles bilaterally. Which of the following is the most appropriate next step in management?

A preschool-aged child is admitted to the pediatric ward due to restricted neck movement, high fevers, and a progressively enlarging left-sided neck mass. Admission imaging confirms a four-centimeter complex fluid collection with surrounding soft tissue inflammation, consistent with acute suppurative cervical lymphadenitis. The patient is empirically started on intravenous vancomycin and ceftriaxone. An ultrasound-guided aspiration is performed, yielding purulent material. The bacterial culture of the aspirate grows Staphylococcus aureus. The susceptibility report indicates the pathogen is susceptible to methicillin, oxacillin, and cefazolin, but resistant to penicillin. By the third day of hospitalization, the child has been afebrile for over forty-eight hours, the localized cervical swelling has markedly decreased, and oral intake has returned to baseline. The medical team is preparing the patient for discharge to complete a fourteen-day course of oral antibiotics at home. Which of the following is the most appropriate outpatient pharmacotherapy?

A 40-week gestation female neonate is delivered via emergency cesarean section due to a severe placental abruption. At delivery, the infant is completely flaccid, has no spontaneous respiratory effort, and has an initial heart rate of 80/min. Arrange the following neonatal resuscitation interventions in the correct chronological sequence, assuming the infant's clinical status continuously deteriorates to a heart rate below 60/min despite the optimal execution of each preceding step.

A 4-year-old boy, who recently immigrated from a country with a high tuberculosis prevalence, is brought to the pediatric clinic due to a 4-week history of low-grade fevers, night sweats, poor appetite, and a persistent, non-productive cough. He appears fatigued and malnourished. His vital signs show a temperature of 38.1°C (100.6°F), heart rate of 115/min, and respiratory rate of 26/min. The clinical facility is equipped with specialized infection control rooms. Arrange the following steps in the most appropriate sequential order for the evaluation and management of this patient.

During the examination of newborns in the postnatal ward, a pediatrician encounters various complications related to operative and complicated deliveries. Match each clinical scenario with the most appropriate diagnosis.

A 14-day-old male infant is brought to the pediatric emergency department by his parents due to irritability, poor feeding, and a new rash that appeared 12 hours ago. He was born at 39 weeks gestation via spontaneous vaginal delivery. Membranes ruptured 18 hours prior to delivery, and a fetal scalp electrode was used during labor. The mother received standard prenatal care. His temperature is 38.3°C (100.9°F), heart rate is 168/min, and respiratory rate is 48/min. The infant appears lethargic but is arousable. Skin examination reveals a localized cluster of 2-mm fluid-filled vesicles on an erythematous base situated on the right temporal scalp. Lung auscultation reveals mild, scattered expiratory wheezing bilaterally. Which of the following is the most appropriate next step in management?

Match each clinical presentation of a symptomatic neonate with the most appropriate first-line management for the underlying congenital infection.

A 17-month-old boy is brought to the urgent care clinic by his parents in January due to a newly developed cough. The parents report that he had a runny nose and a mild fever for the past two days, but last night his cough became harsh and sounded like a barking seal. His voice has also become progressively hoarse. His medical history is unremarkable, and his immunizations are up to date. His temperature is 38.1°C (100.6°F), heart rate is 128/min, respiratory rate is 28/min, and oxygen saturation is 98% on room air. On physical examination, the child is well-appearing, alert, and comfortable while sitting in his mother's lap. When the physician begins the examination, the child starts crying, and a high-pitched inspiratory sound becomes clearly audible. There is no drooling, nasal flaring, or intercostal retractions. Auscultation of the lungs reveals clear breath sounds bilaterally without any expiratory wheezing. Which of the following is the most appropriate next step in the management of this patient?

A pediatric resident is called to evaluate a full-term male newborn who is 2 days old. The nursing staff requested the assessment prior to the infant's planned discharge home. The infant was born at 39 weeks gestation via uncomplicated vaginal delivery to a 24-year-old primigravid mother with a negative group B *Streptococcus* swab. The mother states that her baby is breastfeeding vigorously but had one small episode of non-bilious regurgitation this morning. She also points out a new rash that erupted on his chest and upper arms overnight. The infant's temperature is 36.9°C (98.4°F), pulse is 135/min, and respirations are 42/min. On examination, the infant is active and well-appearing. The abdomen is soft and non-distended. The skin shows numerous 2- to 3-mm erythematous macules, several of which have 1-mm central yellow-white pustules, distributed over the trunk and proximal extremities. The palms and soles are completely clear.

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

Match each clinical presentation of a neonate with respiratory distress to its most likely underlying diagnosis.

A 48-hour-old female newborn is evaluated during routine nursery rounds. She was born at 39 weeks of gestation via an uncomplicated spontaneous vaginal delivery to a 28-year-old primigravid woman. Maternal prenatal testing was negative for HIV, syphilis, and hepatitis B. Group B Streptococcus screening was negative. The infant has been breastfeeding well and has established normal bowel and bladder function. Her temperature is 37.1°C (98.8°F), pulse is 130/min, and respiratory rate is 42/min. On physical examination, she is alert and well-appearing. Skin examination reveals numerous 2- to 3-mm yellow-white pustules on a broad base of irregular erythema. The lesions are clustered primarily on her chest, abdomen, and back, but completely spare the palms and soles. The remainder of the physical examination, including neurologic reflexes and tone, is unremarkable. Which of the following is the most appropriate next step in the management of this patient?

An infant, aged 13 months, is evaluated in the pediatric outpatient clinic due to the sudden appearance of a skin eruption. According to his father, the child experienced a high fever reaching 39.8°C (103.6°F) over the preceding three days, accompanied by mild fussiness and clear rhinorrhea. The fever resolved abruptly this morning, coinciding exactly with the onset of the rash. He is now playing comfortably and drinking fluids normally. His current temperature is 37.1°C (98.8°F), pulse is 112/min, and respirations are 26/min. Physical examination demonstrates a blanching, rose-pink maculopapular exanthem that is most prominent on the trunk, with slight extension to the neck and proximal arms. Non-tender suboccipital lymphadenopathy is present. Auscultation reveals normal breath sounds with no wheezing or crackles. Which of the following is the most appropriate next step in management?

A 3-year-old girl is brought to the emergency department by her parents because she has been refusing to walk since waking up this morning. The parents note she was entirely well yesterday but developed a fever overnight. On examination, her temperature is 39.2°C (102.6°F), heart rate is 130/min, and blood pressure is 95/60 mm Hg. She is holding her right leg in a flexed, abducted, and externally rotated position. She cries inconsolably with any passive range of motion of the right hip. There is no history of trauma.

Arrange the following steps in the most appropriate sequential order for the diagnostic and therapeutic management of this patient.