A nurse is conducting a health history assessment for a client newly diagnosed with leukemia. Which risk factor should the nurse prioritize when asking about the client's medical history?

A) This choice is incorrect because while a complete blood count (CBC) is an important initial screening test for leukemia, it alone is not definitive for diagnosis. A CBC may show abnormal levels of blood cells, prompting further investigation, including a bone marrow biopsy.

B) This choice is incorrect because a urinalysis is not used to diagnose leukemia. It is a test used to evaluate kidney function and detect urinary abnormalities.

C) This choice is incorrect because a chest X-ray is not a definitive diagnostic tool for leukemia. It is primarily used to assess the lungs and chest organs for conditions such as pneumonia or tumors.

D) This choice is correct. A bone marrow biopsy is a definitive diagnostic tool to confirm leukemia. In this procedure, a small sample of bone marrow is taken from the hipbone or breastbone and examined under a microscope to determine if leukemia cells are present. It allows for the identification of abnormal cells in the bone marrow, helping to establish the diagnosis and type of leukemia.

A) This choice is incorrect because the distinction between targeted therapy and chemotherapy is not based on whether the medications are derived from natural or synthetic sources.

B) This choice is correct. Targeted therapy is designed to selectively target leukemia cells, minimizing damage to healthy cells and reducing side effects compared to traditional chemotherapy, which affects both cancerous and healthy cells.

C) This choice is incorrect because the method of administration (hospitalization or outpatient) can vary for both targeted therapy and chemotherapy, depending on the specific drug and treatment plan.

D) This choice is incorrect because targeted therapy and chemotherapy are used in various stages of leukemia treatment, depending on the type and stage of the disease.