Correct Answer: A

Rationale: The correct answer is monitoring for infection. In patients with acute leukemia, the most common cause of death is usually infection or bleeding. By closely monitoring for signs of infection, such as fever, altered mental status, or elevated white blood cell count, healthcare providers can intervene promptly. Monitoring nutritional status (choice B) is important but does not directly address the most common cause of death among leukemia patients. Monitoring electrolyte levels (choice C) and liver function (choice D) are also important assessments in cancer patients; however, they are not the most direct assessment to address the leading cause of death in patients with leukemia.

Correct Answer: C

Rationale: The correct answer is to schedule the client for a chest x-ray. A positive Mantoux test indicates exposure to TB, but it does not confirm active disease. A chest x-ray is necessary to assess the presence of active TB disease. Isolating the client in a private room (Choice A) is not necessary based solely on a positive Mantoux test result. Administering isoniazid (INH) (Choice B) or beginning a 9-month course of medication therapy (Choice D) is premature without confirming active TB through a chest x-ray.

Correct Answer: B

Rationale: The best action for the nurse in this situation is to help the family show other ways to demonstrate love and caring. When a client with cancer is experiencing anorexia and mucositis, it can be challenging for them to eat even their favorite foods. By assisting the family in finding alternative ways to provide comfort and care, the nurse can help create a supportive environment for the client. Option A is not the best choice as explaining the pathophysiologic reasons may not address the emotional needs of the client and family. Option C, suggesting foods and liquids, might not be helpful if the client is unable to tolerate them due to their condition. Option D, telling the family that the client can't eat, may come across as dismissive and not supportive of the family's concerns.

Correct Answer: A

Rationale: The correct answer is A: Decreased immune function. Aging leads to a decline in immune function, which increases susceptibility to infections during chemotherapy. This decline is due to changes in the immune system that occur with age. Choices B, C, and D are incorrect because while they may impact overall health in older clients, they do not directly increase susceptibility to infections during chemotherapy like decreased immune function does.

Correct Answer: C

Rationale: The correct answer is C: 'Back pain.' Back pain is a common symptom of spinal cord compression in cancer patients. This condition can cause localized or radiating back pain due to the compression of the spinal cord or nerves. While symptoms such as decreased deep tendon reflexes, severe headache, and loss of bladder control can occur in other conditions, back pain is specifically associated with spinal cord compression in cancer patients.