Question Banks

A 1-week-old, bottle-fed, low-birth-weight neonate develops severe  abdominal pain with bloody diarrhea. Several hours later, the neonate   undergoes emergency surgery. A portion of small intestine is resected   , and pathologic examination demonstrates a perforation. Which of the   following would most likely be seen on microscopic examination of the    involved bowel?

A 68-year-old man presents to his physician with complaints of fatigue  and a dragging sensation in his abdomen. Physical examination is remarkable   for massive splenomegaly without lymphadenopathy. The patient's hematocrit    is 30%, his platelet count is 80,000/mm3, and his leukocyte count is    2500/mm3. Bone marrow biopsy shows 'fried egg' cells expressing the     pan B-cell markers CD19 and CD20, and the monocyte marker CD11c.      Positive staining for which of the following substances would most       likely verify the likely diagnosis?

A 22-year-old male military recruit complains of a headache and stiff  neck. He is examined, blood is drawn, and a lumbar puncture performed.   The glucose in the CSF is 100 mg/dL and the serum glucose is 120 mg/dL.    The CSF shows 3 lymphocytes and 0 neutrophils/microliter. Which of the    following conclusions concerning the interpretation of these findings     is most accurate?

A newborn baby has a prominent defect at the base of his spine through  which his meninges and spinal cord protrude. A failure of which of the   following processes is the most common cause of this type of defect?

Which of the following is thought to be a major contributor to the  cachexia often experienced by patients with advanced cancer?

A patient, who appears to be female, is found to be 46,XY. The patient's  vagina is very shallow, ending in a blind pouch, and there are palpable   masses in the labia. The diagnosis of testicular feminization syndrome    is made. Which of the following was most likely present during the early     fetal life of this individual?

A patient develops a swollen and tender lymph node in his popliteal  fossa. An infected skin lesion in which of the following sites would most   likely induce lymphadenopathy in this region?

A 37-year-old female presents to the emergency room with a fever.  Chest x-ray shows multiple patchy infiltrates in both lungs.   Echocardiography and blood cultures suggest a diagnosis of    acute bacterial endocarditis limited to the tricuspid valve.     Which of the following is the most probable etiology?

During an intra-abdominal operation, a surgeon asks a medical student  to pass his hand toward the head, along the inner aspect of the anterior   abdominal wall, slightly to the right of the midline. The reflection of    which of the following will eventually stop the movement of the     student's hand?

A 1-year-old child develops voluminous watery diarrhea and vomiting . She is brought to the pediatrician by her parents and evaluated, then  sent home with instructions for the parents to give the child an   electrolyte replacement solution. Which of the following viruses    is the most likely cause of the child's diarrhea?