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A 20-year-old man is brought to the emergency department by his college roommate due to profound fatigue, severe depressed mood, and increased appetite for the past two days. The roommate reports that last week, the patient was awake for four consecutive days preparing for final exams. During that time, the patient was highly energetic, unusually talkative, and told his roommate he had "unlocked the mathematical secrets of the universe." The patient now sleeps up to 16 hours a day and complains of intensely vivid, disturbing dreams when he briefly awakens. He has no prior medical or psychiatric history and takes no prescribed medications. Vital signs are temperature 36.8°C (98.2°F), blood pressure 112/72 mm Hg, pulse 58/min, and respirations 14/min. Physical examination shows a flat affect and significant psychomotor retardation, but no focal neurological deficits. Which of the following is the most appropriate next step in management?

Match each clinical presentation of a pediatric lysosomal storage disorder with the most likely underlying enzyme deficiency.

A $48$-year-old multiparous woman presents to the clinic complaining of heavy, irregular vaginal bleeding, foul-smelling discharge, and deep pelvic pain for the past $3$ months. She has not seen a physician in over a decade. Pelvic examination reveals a $6$-cm friable, exophytic mass replacing the cervix. Rectovaginal examination demonstrates nodularity and induration extending into the medial aspect of the right parametrium, but not to the pelvic sidewall. Arrange the following steps in the most appropriate sequence for the diagnosis, staging, and definitive management of this patient's condition.

Identify the most likely diagnosis for each of the following third-trimester obstetric presentations.

A 15-year-old girl is brought to the clinic by her mother for evaluation of absent menstrual periods. She has never menstruated. Physical examination reveals a height at the 5th percentile for age, Tanner stage 1 breast development, and normal-appearing female external genitalia with a patent vagina. A urine pregnancy test is negative. Arrange the following diagnostic and management actions in the most appropriate sequential order according to the standard algorithmic approach for primary amenorrhea.

Evaluate the following clinical and laboratory profiles of patients presenting with amenorrhea. Match each profile to the most likely underlying diagnosis.

A 26-day-old male infant is brought to the pediatric emergency department by his parents due to rapid breathing, poor feeding, and a persistent cough for the past 48 hours. He was born at 38 weeks gestation via uncomplicated spontaneous vaginal delivery. The parents also express concern because the infant does not yet display a social smile or coo. Vital signs show a temperature of 37.5°C (99.5°F), pulse of 165/min, and respirations of 68/min. Pulse oximetry is 91% on room air. Physical examination reveals nasal flaring, prominent intercostal retractions, and diffuse expiratory wheezing with bilateral crackles. Skin examination shows multiple erythematous papules and pustules lacking comedones, strictly confined to his forehead, nose, and cheeks, which the parents say appeared three days ago. A rapid viral respiratory panel is positive for respiratory syncytial virus (RSV). Which of the following is the most appropriate management plan for this patient's current findings?

Match the following clinical presentations of trauma patients to the most appropriate next step in management. Assume airway and breathing have been assessed and secured in all patients.

A 26-year-old man with a recent diagnosis of schizophrenia is initiated on haloperidol therapy. As his physician, you will monitor him closely for extrapyramidal symptoms (EPS). Arrange the following clinical presentations of extrapyramidal side effects in the correct chronological order based on their typical onset following the initiation of typical antipsychotic therapy, from earliest onset to latest onset.

Review the following clinical presentations of pediatric exanthems and pair each patient scenario with the most likely causative viral agent.

Match each clinical presentation of urinary incontinence with its most appropriate next step in management.

Match each clinical presentation of a neonatal skin finding to the most likely diagnosis.

The natural history of schizophrenia typically unfolds over a patient's lifespan, reflecting its underlying neurodevelopmental pathology. Arrange the following characteristic clinical phases of the disorder in their correct chronological sequence of occurrence, from the earliest manifestation to the most advanced chronic stage.

Following a routine well-woman examination, a 52-year-old nulligravid patient is asked to return to the clinic to discuss her cervical cytology results. She transitioned through menopause at age 50 and denies any postmenopausal bleeding, pelvic pressure, or abnormal vaginal discharge. Her current health is excellent with no chronic medical conditions, and she takes no medications. Pelvic examination demonstrates normal external genitalia, a parous-appearing cervix without gross lesions, and a small, mobile uterus without adnexal masses. The cytology report notes the presence of atypical glandular cells (AGC). A concurrent high-risk human papillomavirus (HPV) test is negative. Which of the following is the most appropriate next step in the diagnostic evaluation?

A 5-month-old female is evaluated in an urgent care clinic during late January for a cough and fast breathing. According to her father, she developed nasal congestion and a mild fever three days prior. Since yesterday, she has been coughing frequently and seems to be working harder to breathe. She was born at 39 weeks gestation without complications and has received all age-appropriate vaccinations. Her 3-year-old sister recently recovered from a mild respiratory infection. Temperature is 37.6°C (99.7°F), pulse is 145/min, respiratory rate is 56/min, and oxygen saturation is 95% on room air. Examination shows clear, copious rhinorrhea. Lung auscultation reveals diffuse expiratory wheezes and crackles bilaterally, along with mild subcostal retractions. Which of the following is the most appropriate next step in the management of this patient?

Match the following neonatal cranial swellings and findings with their correct pathophysiologic descriptions and clinical presentations.

Match each patient's clinical presentation with the most accurate diagnosis and guideline-concordant management step.

A 3-year-old boy is brought to the pediatric emergency department by his parents due to a 12-hour history of high fever, extreme lethargy, and a rapidly spreading rash. The patient was previously healthy and is fully immunized. Temperature is 39.9°C (103.8°F), blood pressure is 72/40 mm Hg, pulse is 175/min, and respirations are 38/min. Pulse oximetry shows 92% on room air. On examination, the child is lethargic and minimally responsive to pain. He has cold extremities with a capillary refill time of 5 seconds. A diffuse, non-blanching purpuric and petechial rash is present over the trunk and lower extremities. The airway is patent, but he has shallow breathing. Arrange the following critical management steps in the most appropriate sequential order of priority.

In the emergency department setting, rapid identification of specific substance toxidromes is critical for guiding appropriate acute management and supportive care. Match each substance-related clinical state with its most characteristic physical examination findings and clinical presentation.

A 6-year-old girl is brought to the emergency department by her parents due to generalized tonic-clonic seizures that have been ongoing for 15 minutes. She recently returned from a 4-week trip visiting relatives in rural Uganda. Her parents report she has had a high fever, vomiting, and increasing lethargy over the last 3 days. She has not received any travel-related prophylaxis. On presentation, her temperature is $39.8^\circ\text{C}$ ($103.6^\circ\text{F}$), heart rate is $160/\text{min}$, and blood pressure is $85/50\text{ mmHg}$. She is unresponsive to verbal stimuli. Point-of-care blood glucose is $45\text{ mg/dL}$. Arrange the following acute management steps in the most appropriate sequential order.