A patient with prostate cancer is undergoing brachytherapy using radioactive seeds.
Which of the following precautions should the nurse educate the patient about during their treatment?

Choice A rationale

Diarrhea is not a primary or life-threatening complication associated with medications that stimulate platelet production, such as oprelvekin or thrombopoietin receptor agonists. While gastrointestinal upset can occur with many medications, it does not represent the significant physiological risks targeted by nursing surveillance in this specific therapy. The focus of monitoring for these agents is centered on fluid balance and vascular integrity, as these drugs significantly impact intravascular osmotic pressure and the coagulation cascade through increased cellular production.

Choice B rationale

Nausea and vomiting are common side effects of many systemic therapies but are not considered the most critical or specific complications of platelet-stimulating agents. These symptoms are generally managed with antiemetics and do not typically require the cessation of therapy. When managing a patient on oprelvekin, the nurse prioritizes monitoring for systemic inflammatory responses and fluid retention over mild gastrointestinal distress, as the latter does not usually lead to long-term morbidity or acute cardiovascular collapse in this context.

Choice C rationale

Stimulating the production of platelets, or thrombopoiesis, carries a significant risk of inducing a prothrombotic state where blood clots may form. When the platelet count rises rapidly or exceeds the normal range of 150,000 to 450,000 cells/uL, the risk for deep vein thrombosis, pulmonary embolism, or myocardial infarction increases. The nurse must assess for signs of vascular occlusion, including localized edema, redness, and sudden chest pain, as the increased cell density enhances blood viscosity and clotting.

Choice D rationale

Bone fractures are not a typical complication of platelet-stimulating therapy. While some colony-stimulating factors can cause bone pain due to the expansion of bone marrow, they do not generally lead to acute structural failure or pathological fractures. Bone marrow stimulation is a physiological process that occurs within the medullary cavity and, while uncomfortable, does not degrade the mineral density of the cortical bone. Nursing care focuses on pain management rather than fall precautions related to skeletal fragility in these patients.

Choice E rationale

Pulmonary edema is a severe complication specifically linked to oprelvekin therapy due to its tendency to cause sodium and water retention. The resulting expansion of plasma volume increases hydrostatic pressure within the pulmonary capillaries, leading to fluid shifting into the alveoli. The nurse must monitor for dyspnea, crackles upon auscultation, and decreased oxygen saturation. This fluid shift can lead to acute respiratory distress syndrome, making frequent cardiovascular and respiratory assessments essential for early detection of fluid overload.

Choice A rationale

Adrenal tumors represent only one specific cause of hypercortisolism. This statement is scientifically inaccurate because it fails to account for pituitary adenomas, ectopic ACTH production, or exogenous steroid administration. While adrenal adenomas or carcinomas can lead to Cushing's syndrome by autonomously secreting cortisol, they do not define Cushing's disease. Pathophysiologically, the term syndrome encompasses all etiologies of high cortisol, whereas the disease is specifically linked to the pituitary gland's overproduction of adrenocorticotropic hormone.

Choice B rationale

Cushing's disease is a specific subset of Cushing's syndrome caused by a pituitary adenoma secreting excess adrenocorticotropic hormone. This hormone stimulates the adrenal cortex to produce cortisol. Conversely, Cushing's syndrome is an umbrella term for any condition resulting in prolonged exposure to high cortisol levels, whether endogenous or exogenous. Common causes include long-term glucocorticoid therapy, adrenal tumors, or ectopic ACTH from small cell lung cancer. Normal serum cortisol ranges are 5 to 23 mcg/dL.

Choice C rationale

This choice incorrectly identifies the primary cause of Cushing's disease. Long-term glucocorticoid use is actually the most common cause of exogenous Cushing's syndrome, not the disease itself. Cushing's disease involves a primary internal pathology of the pituitary gland. Furthermore, claiming the syndrome is caused only by adrenal tumors is scientifically false, as it ignores the massive clinical population receiving therapeutic steroids for autoimmune or inflammatory conditions. The underlying molecular mechanism involves the disruption of the hypothalamic-pituitary-adrenal axis.

Choice D rationale

This statement reverses the clinical definitions and causes confusion regarding the terminology. Cushing's disease is never defined by external glucocorticoid administration; that is a hallmark of iatrogenic Cushing's syndrome. The disease refers specifically to the pituitary-driven process. While both involve high cortisol, the diagnostic differentiation is critical because treatment for the disease usually involves transsphenoidal surgery, while treatment for the syndrome depends entirely on the specific underlying trigger, such as tapering off prednisone or removing an adrenal mass.