Initial 6 and 8 cores transrectal ultrasound guided prostate biopsy techniques are inadequate compared to 10 or 12 cores in detecting prostate cancer

Abstract

Objectives: Limited data exist regarding the comparison of 6, 8, 10 and 12 cores of transrectal ultrasound guided biopsy (TRUS-Bx) of the prostate in detecting prostate cancer (PCa). The purpose of this study was to compare the cancer detection rates of 6, 8, 10 and 12 cores TRUS-Bx of the prostate on the same cohort of patients. 

Material and Methods: Between February 2005 and January 2011, 2033 men with serum PSA levels higher than 2.5 ng/mL and/or with an abnormal digital rectal examination underwent TRUS-Bx of the prostate. Of the patients, 1131 (55.6%) who underwent initial 12 cores TRUS-Bx of the prostate were included in the study. Patients’ pathology results were re-evaluated if they had undergone 6, 8, and 10 cores biopsies rather than 12 cores. PCa detection rates of these techniques were compared. 

Results: Overall, 20.9% (236 of 1131) of the patients had PCa detected on 12 cores biopsy. Cancer detection rates of 6 cores, 8 cores and 10 cores biopsies were calculated as 16.4%, 20.1% and 20.4%, respectively. No significant difference was detected between 10 and 12 cores biopsy techniques in detecting PCa (P = 0.06). However, 12 cores biopsy had significantly higher PCa detection rate compared to both 6 (P < 0.0001) and 8 (P = 0.0039) cores biopsies. 

Conclusion: Standard 6 and 8 cores of prostate biopsy seem to be inferior compared to 10 or 12 cores of TRUS-Bx of the prostate in detecting PCa. Therefore, 12 cores should be included in the initial TRUS-Bx of the prostate. 

Keywords

• Biopsy
• prostate
• prostate neoplasm

Prostat kanser tespitinde ilk seferde transrektal ultrason eşliğinde alınan 6 ve 8 kadran prostat biyopsi teknikleri 10 veya 12 kadrana göre yetersizdir

Abstract

Amaç: Prostat kanseri (PCa) tespitinde transrektal ultrason eşliğinde (TRUS-Bx) alınan 6,8,10 ve 12 kadran biyopsi tekniklerini karşılaştıran sınırlı sayıda veri vardır. Bu çalışmanın amacı aynı hasta kohortunda 6,8,10 ve 12 kadran prostat TRUS-Bx tekniklerinin kanser tespit oranı açısından karşılaştırmaktır. 

Gereç ve Yöntemler: Şubat 2005 ile Ocak 2011 tarihleri arasında, serum prostat spesifik antijen (PSA) değeri 2.5 ng/mL üzeri ve/veya anormal tuşe bulguları olan 2033 erkeğe prostat TRUS-Bx uygulandı. İlk seferde 12 kadran prostat biyopsisi alınan 1131 (%55.6) hasta çalışmaya dahil edildi. Hasta patolojileri hastalara 12 kadran biyopsi yerine 6,8 ve 10 kadran alınmış gibi tekrar değerlendirildi. Bu tekniklerin PCa tespit oranları karşılaştırıldı. 

Bulgular: Toplamda hastaların %20.9’unda (236/1131) 12 kadran biyopsi ile PCa tespit edildi. Altı kadran, 8 kadran ve 10 kadran biyopsilerin kanser tespit oranı sırasıyla %16.4, %20 .1 ve %20.4 olarak hesaplandı. On ve 12 kadran biyopsi teknikleri arasında PCa tespiti açısından anlamlı bir farklılık saptanmadı (p=0.006). Ancak 12 kadran biyopsinin PCa tespit oranı hem 6 kadran (p < 0.0001) hem de 8 kadran (p=0.0039) biyopsiye göre anlamlı olarak yüksekti. 

Sonuç: Standart 6 ve 8 kadran prostat biyopsisi PCa tespitinde 10 yada 12 kadran prostat biyopsisine kıyasla değersiz görünmektedir. Bundan dolayı ilk prostat biyopsisi 12 kadranı içermelidir. 

Keywords

• Biyopsi
• prostat
• prostat neoplazmı

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