Correct Answer: A

Rationale: Leukemia commonly involves unregulated proliferation of white blood cells.

Correct Answer: B

Rationale: Doxorubicin (Adriamycin) is an anthracycline chemotherapy agent commonly used to treat various cancers, including breast cancer. One of the significant side effects associated with doxorubicin is cardiotoxicity, which can lead to serious complications such as heart failure and arrhythmias. The risk of cardiotoxicity is dose-dependent, meaning that higher cumulative doses increase the likelihood of cardiac damage. Therefore, it is essential for nurses to monitor cardiac function closely through assessments such as echocardiograms or monitoring for signs and symptoms of heart failure, such as shortness of breath, fatigue, and edema.

Correct Answer: B

Rationale: In the management of breast cancer, particularly after procedures such as a mastectomy, it is important to position the patient in a way that promotes healing and comfort. However, lying down with 1-2 pillows is not a standard practice for postoperative care. Instead, patients are often advised to elevate the affected arm to reduce swelling and promote drainage, and they may benefit from sleeping in a more upright position if they are experiencing discomfort. The focus should be on facilitating recovery rather than simply lying down.

Correct Answer: C

Rationale: In clients experiencing neutropenia due to chemotherapy, the immune system is significantly compromised, leaving the client highly susceptible to infections. Meticulous hand hygiene is one of the most effective ways to prevent infections in neutropenic patients. Teaching the client and their family the importance of frequent and proper handwashing helps reduce the transmission of harmful pathogens that could lead to severe infections in the neutropenic client. This simple but essential intervention is crucial in maintaining a safe environment.

Correct Answer: A

Rationale: Leukemia commonly involves unregulated proliferation of white blood cells.