What disadvantages of chemotherapy should the patient be informed about prior to starting the regimen?
It causes a systemic reaction.
It targets normal body cells as well as cancer cells.
There are no disadvantages.
It attacks cells during their vulnerable phase.
Correct Answer : A,B,D
Choice A rationale
Chemotherapy agents are distributed systemically throughout the body via the bloodstream. This systemic distribution allows them to reach cancer cells in various locations but also leads to widespread effects on normal, rapidly dividing cells, causing a broad range of systemic side effects like nausea, fatigue, and hair loss.
Choice B rationale
Chemotherapeutic drugs primarily target rapidly dividing cells by interfering with various stages of the cell cycle, such as DNA replication or mitosis. Unfortunately, normal healthy cells with high proliferation rates, like those in bone marrow, hair follicles, and the gastrointestinal tract, are also affected, leading to common side effects.
Choice C rationale
This statement is incorrect. Chemotherapy is associated with numerous disadvantages and adverse effects due to its non-specific targeting of rapidly dividing cells. These disadvantages range from mild discomforts like nausea to severe, life-threatening complications like myelosuppression and organ toxicity.
Choice D rationale
Chemotherapy agents exert their cytotoxic effects by disrupting cellular processes during vulnerable phases of the cell cycle (e.g., S phase for DNA synthesis inhibitors, M phase for mitotic inhibitors). Cancer cells, with their uncontrolled proliferation, are often caught in these vulnerable phases, making them susceptible to the drug's action.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
While many chemotherapeutic agents have emetogenic properties leading to dehydration, this is not the specific adverse effect associated with a vesicant's primary danger. Vesicants cause tissue damage upon extravasation, whereas emesis and subsequent dehydration are systemic side effects managed with antiemetics and fluid replacement.
Choice B rationale
Orthostatic hypotension is typically associated with volume depletion or certain cardiovascular medications, not directly with fluid expansion. Furthermore, vesicant administration does not inherently cause systemic fluid expansion leading to orthostatic hypotension. The primary concern with vesicants is local tissue damage.
Choice C rationale
Vesicants are chemotherapy agents that cause severe tissue damage, including blistering, necrosis, and ulceration, if they leak out of the vein into the surrounding subcutaneous tissue. Monitoring for infiltration is crucial, as prompt recognition and intervention are necessary to minimize tissue injury and potential long-term complications.
Choice D rationale
The presence of blood in urine (hematuria) or stool (melena/hematochezia) indicates systemic toxicity affecting the genitourinary or gastrointestinal tracts, such as myelosuppression leading to thrombocytopenia or direct organ damage. While serious, this is a systemic effect, not the primary adverse effect of a vesicant's local infiltration.
Correct Answer is D
Explanation
Choice A rationale
Enlarged gonads are not a typical side effect of estrogen therapy for prostate cancer. Estrogens, by acting as negative feedback on the hypothalamic-pituitary-gonadal (HPG) axis, suppress luteinizing hormone (LH) and follicle-stimulating hormone (FSH) release from the pituitary. This suppression leads to decreased testicular production of testosterone, resulting in gonadal atrophy (shrinkage), rather than enlargement, and reduced sperm production.
Choice B rationale
Acne is not a common side effect of estrogen therapy in males; in fact, it often improves. Acne is primarily androgen-dependent, stimulated by high levels of testosterone and other androgens, which promote sebum production and follicular keratinization. Estrogen therapy, by suppressing testosterone, effectively reduces androgenic stimulation, leading to a decrease in sebaceous gland activity and subsequent improvement in acne symptoms.
Choice C rationale
Increased hirsutism, or excessive hair growth, is not a typical side effect of estrogen therapy in males. Hirsutism is primarily driven by androgenic hormones, which stimulate terminal hair growth in androgen-sensitive areas. Estrogen therapy, by reducing endogenous testosterone levels, often leads to a decrease in body hair and may result in a more feminized hair pattern, rather than increased hirsutism.
Choice D rationale
Gynecomastia, the enlargement of male breast tissue, is a very common and expected side effect of estrogen therapy for prostate cancer. Estrogens stimulate the proliferation of mammary ductal epithelial cells and increase fat deposition in breast tissue. This effect is dose-dependent and results from the direct agonistic action of estrogens on estrogen receptors in breast tissue, leading to breast tenderness and palpable breast enlargement.
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