Correct Answer: A

Rationale: The correct answer is A: Age younger than 50 years. Colorectal cancer is more commonly diagnosed in individuals over the age of 50, so being younger than 50 is not typically considered a significant risk factor. Choice B, history of colorectal polyps, is a known risk factor as polyps can develop into cancer over time. Choice C, family history of colorectal cancer, is a well-established risk factor due to genetic predisposition. Choice D, chronic inflammatory bowel disease, such as Crohn's disease or ulcerative colitis, increases the risk of developing colorectal cancer. Therefore, the incorrect choice is A as age younger than 50 years is not a common risk factor for colorectal cancer.

Correct Answer: A

Rationale: The correct answer is A: Protective isolation and vigilant use of standard precautions. Induction therapy for acute myeloid leukemia (AML) can lead to neutropenia, significantly increasing the risk of infections. Therefore, the priority is to protect the patient from potential pathogens by implementing protective isolation measures and adhering to strict standard precautions. This action is crucial for the patient's survival. Choice B is incorrect as nutritional support and oral hygiene are important but not the priority in this situation. Choice C, involving the family in planning activities, is a valuable aspect of care but not the priority during induction therapy. Choice D, monitoring and treating pain, is essential but ensuring protection against infection takes precedence due to the high risk of neutropenia.

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.

Correct Answer: C

Rationale: The correct answer is C. Taking aspirin is not recommended during periods of bone marrow suppression as it can increase the risk of bleeding. Aspirin is a nonsteroidal anti-inflammatory drug (NSAID) that can impair platelet function, further exacerbating the risk of bleeding. Choices A, B, and D are all appropriate statements for a client at risk for bleeding and undergoing chemotherapy. Blowing the nose gently, being prepared for a platelet transfusion if needed, and monitoring menstrual bleeding are all important aspects of self-care during this period.

Correct Answer: D

Rationale: An absolute neutrophil count of 500/mm3 indicates severe neutropenia, putting the client at high risk for infection. Neutrophils are crucial in fighting off infections; a low count increases susceptibility to infections. Platelet count, white blood cell count, and hemoglobin levels are within normal ranges and do not require immediate intervention in this scenario.