109年:內專
有關前列腺特異抗原(PSA,prostate specific antigen)之敘述,下列何者為真?
AMost prostate cancer deaths occur in men with PSA levels below the top quartile.
BPSA is produced by malignant and non-malignant prostate cells.
CThe US Preventive Services Task Force (USPSTF) recommends PSA screening in men between 55 and 69 years of age.
DThe American Urological Association (AUA) recommends PSA screening in men 40-55 years of age.
EAsymptomatic men with an elevated PSA should receive a 2-week course of antibiotics before repeating PSA and considering biopsy.
詳細解析
本題觀念:
本題聚焦於前列腺特異抗原(PSA)的生物學來源及臨床應用,包括PSA由哪些細胞分泌、PSA篩檢的指引建議,以及PSA升高後的後續處置策略。
選項分析
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選項A
「Most prostate cancer deaths occur in men with PSA levels below the top quartile.」
研究顯示,在一項超過4萬名無症狀男性的世代隊列研究中,約有三分之二至四分之三的前列腺癌死亡事件都發生在基線PSA值位於最高四分位數的族群中;只有極少數死亡來自於PSA低於中位數者。因此大多數死亡其實都與高PSA(最高四分位數)相關,非低於最高四分位數者 (ncbi.nlm.nih.gov)。 -
選項B
「PSA is produced by malignant and non-malignant prostate cells.」
官方資料指出,PSA是一種由正常及惡性前列腺上皮細胞共同分泌的蛋白質,良性前列腺增生、前列腺炎及癌細胞均可產生PSA ([cancer.gov](https://www.cancer.gov/types/pros
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