Which of the following antigens is a T-cell marker?

Related MCQs

• A 45-year-old woman noticed tinnitus in her left ear which progressed over some weeks to hearing loss in that ear. On physical examination she is found to have a marked decrease in hearing on the left, with Rinne test indicating air conduction better than bone conduction. The other cranial nerves I - VII and IX - XII are intact. A brain MRI scan revealed a solitary, fairly discreet, 3 cm mass located in the region of the left cerebellopontine angle. Which of the following statements is most appropriate to tell the patient regarding these findings?
• A 65-year-old woman with no significant past medical history presents to the emergency department with a 2-day history of left lower quadrant abdominal pain. The patient denies nausea and vomiting, although she claims decreased oral intake. She also reports a low-grade fever and mild diarrhea. She describes a milder episode several years ago, which resolved on its own. On physical examination, the patient is found to have left lower quadrant tenderness with some mild guarding, but no rebound. She is hemodynamically stable, and her heart rate is 82 per minute. In the initial management of this patient, which of the following is the most sensitive diagnostic test?
• A 67-year-old man in previously good health is hospitalized because of a 2-day history of fever and diminished consciousness. The patient responds inconsistently to verbal commands. His temperature is 39.5 °C (103.1 °F); he has tachycardia, and his blood pressure is 80/58 mm Hg. There is no bleeding. His hemoglobin is 12.1 g/dL, leukocyte count is 29,000/μL with 80% neutrophils, and platelet count is 20,000/μL. Which of the following studies should be obtained in this patient?
• A 43-year-old man with severe acquired aplastic anemia has not responded to immunosuppressive agents. He remains neutropenic and transfusion-dependent for platelets and red cells. He has an HLA-identical brother who has been cleared as a donor for his planned allogeneic stem cell transplant.They are both cytomegalovirus-seronegative. Which of the following would be prevented by using irradiated cellular blood products for this patient?
• Which one of the following statements is true of B cell CLL?
• Which of the following associations is correct?
• Which of the following statements regarding lymphomas in childhood is correct?
• A 25-year-old woman has her first routine check-up. Her mother died of lung cancer at the age of 60 years, and her father has had a head and neck cancer. She is very worried about getting cancer and wants to know what she can do to reduce her risk, as much as possible, of getting either of these cancers. In addition to avoidance of tobacco, which of the following approaches has been demonstrated to decrease risk for one or both of these cancers?
• Which of the following cancer screening tests has been shown in randomized trials to decrease the risk of death from the target cancer?
• A 45-year-old woman is evaluated because of a palpable 2-cm right axillary lymph node. The lymph node is completely resected, and histologic study shows adenocarcinoma; hormone receptors are negative. Bilateral mammography is negative, as is MRI of the right breast. CT scans of the chest and abdomen are negative for tumor, and no further lymphadenopathy is detected. Results of bone scan and MRI of the head are also unremarkable. The patient had been previously healthy and has never smoked. Which of the following statements about this patients condition is correct?