Correct Answer: A

Rationale: Corrected Rationale: Impaired nutritional status is a potential adverse effect of radiotherapy to the head and neck due to alterations in oral mucosa and taste. While cognitive changes, diarrhea, and alopecia can be side effects of other treatments or conditions, they are not typically associated with external radiation for a malignant tumor of the neck. Therefore, the nurse should primarily focus on discussing the risk of impaired nutritional status with the patient.

Correct Answer: B

Rationale: The correct answer is B. Malignant cells have different proteins in their membranes, such as tumor-specific antigens, which distinguish them from benign cells. Choice A is incorrect as cancer cells typically have a rapid and uncontrolled rate of mitosis. Choice C is incorrect as the size of cells alone does not distinguish between malignant and benign cells. Choice D is incorrect as the molecular structure is not the primary characteristic that distinguishes between malignant and benign cells.

Correct Answer: A

Rationale: The correct answer is A: Tumor lysis syndrome (TLS). Tumor lysis syndrome is a potential complication after treatment for certain cancers, including non-Hodgkin lymphoma. The rapid breakdown of cancer cells in response to treatment can lead to metabolic abnormalities, such as hyperkalemia, hyperphosphatemia, hypocalcemia, and hyperuricemia, which can be life-threatening. Choice B, Syndrome of inappropriate antidiuretic hormone (SIADH), is not typically associated with non-Hodgkin lymphoma treatment. Choice C, Disseminated intravascular coagulation (DIC), is more commonly seen in conditions such as sepsis or trauma, not directly related to non-Hodgkin lymphoma treatment. Choice D, Hypercalcemia, is not a common complication following treatment for non-Hodgkin lymphoma.

Correct Answer: D

Rationale: The nurse should encourage patients to reduce other factors that increase the risk of developing second cancers, such as the use of tobacco and alcohol and exposure to environmental carcinogens and excessive sunlight. Choice A is too general and does not address the specific concerns of a cancer patient. Choice B uses fear tactics, which may not be the most effective approach. Choice C is vague and does not provide a clear rationale for the behavior change, unlike Choice D which specifically links the behaviors to reducing the risk of second cancers.

Correct Answer: B

Rationale: The correct answer is B: 'Promoting bed rest to avoid injury.' In patients with multiple myeloma undergoing chemotherapy, encouraging bed rest can lead to muscle weakness and bone loss, increasing the risk of fractures. Promoting bed rest to avoid injury means advising the patient on safe movement and activities to prevent fractures. Encouraging weight-bearing exercises (choice C) would be more beneficial than bed rest as it helps in maintaining bone density and strength. Ensuring adequate hydration (choice D) is essential for overall health but does not directly address the risk of bone fractures associated with multiple myeloma and chemotherapy. Choice A, 'Encouraging bed rest,' is incorrect as it may worsen the risk of fractures rather than reduce it.