A 3-day-old baby is brought to the hospital due to vomiting, fever, and rectal bleeding. Upon physical and CT scan examinations, it is discovered that the baby has a small bowel obstruction and is diagnosed with Meckel’s diverticulum. Which part of the gastrointestinal tract is most likely responsible for the development of the diverticulum, which may be connected to the inner surface of the umbilicus by a fibrous cord?
A 3-month-old boy is admitted to the hospital with diarrhea, vomiting, and difficulty in bowel movements. A computed tomography (CT) scan of his abdomen reveals a distinctly dilated lower colon and is diagnosed as having Hirschsprung’s disease. Which of the following is the most likely embryonic mechanism responsible for development of this congenital megacolon?
A 28-year-old woman involved in a car accident is brought into the emergency department. Her magnetic resonance imaging reveals that she has a laceration of the spinal cord at the L4 spinal cord level. Which of the following structures would you expect to be intact?
A 28-year-old woman is admitted to a hospital because the birth of her child is several days overdue. Tearing of the pelvic diaphragm during childbirth leads to paralysis of which of the following muscles?
A 28-year-old woman with a goiter comes to the hospital for surgical treatment. The surgeon must ligate the superior laryngeal artery before surgically resecting the goiter, so care must be taken to avoid injury to which of the following nerves?
A 28-year-old woman with a ruptured ectopic pregnancy is admitted to a hospital for culdocentesis. A long needle on the syringe is most efficiently inserted through which of the following structures?
A 28-year-old woman with abdominal pain was admitted to a local hospital, and examination shows that a retroperitoneal infection is affecting a purely endocrine gland. Which of the following structures is infected?
A 29-year-old basketball player falls while rebounding and is unable to run and jump. On physical examination, he has pain and weakness when extending his thigh and flexing his leg. Which muscle involved in both movements is most likely injured?
A 28-year-old patient with Marfan’s syndrome has an aneurysm of the aortic arch. This may compress which of the following structures?
A 28-year-old pianist with a known carpal tunnel syndrome experiences difficulty in finger movements. Which of the following intrinsic muscles of her hand is paralyzed?