A 56-year-old woman is admitted to hospital with gastrointestinal bleeding. Her hemoglobin level is low and the physician who saw her in the Emergency Department has recommended a blood transfusion. You attend her on the unit and tell her that a blood transfusion will help her feel better. Which one of the following is the best next step?
A previously well 4-year-old boy is brought to your office by his mother. She is concerned by his behaviour. Shortly after falling asleep, he awakens, screams loudly and cries. He appears frightened and does not respond to his mother’s efforts to calm him. During these episodes, he appears agitated and flushed. After 15–20 minutes, he settles back to sleep. Physical examination is unremarkable. Which one of the following is the most likely diagnosis?
A 67-year-old man underwent his first endoscopy. He has long-term reflux and heartburn, treated intermittently with antacids. Biopsies of the distal esophagus reveal Barrett epithelium. Which one of the following is most important in determining the frequency of surveillance endoscopy?
A 34-year-old woman, gravida 3, para 2, comes to your office for prenatal care. Past medical history includes 2 precipitous uncomplicated term deliveries of infants greater than 4200 g. Which one of the following is she most at risk of developing?