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    Evaluation of the optimal sampling approach for HPV genotyping in circumcised heterosexual men with genital warts
    (Elsevier, 2023) Sarier, Mehmet; Sepin, Nevgun; Emek, Mestan; Konuk, Elcin Yenidunya; Kaplan, Tugrul; Yuksel, Burcu Aykan; Barut, Zerrin
    Background: Human papillomavirus (HPV) causes a serious socioeconomic burden globally. However, there is currently no consensus on the optimal sampling method for HPVDNA genotyping in circumcised heterosexual men. This study aimed to determine the diagnostic efficacy of 6 different anatomic sampling sites in HPV DNA polymerase chain reaction (PCR) testing of circumcised heterosexual men with genital warts.Methods: The study included circumcised heterosexual men who presented to our clinic with complaints of genital warts. Swab samples were obtained from the penile shaft (PS), scrotum, coronal sulcus (CS), and external urethral meatus (EUM). First-void urine (FVU) and genital wart biopsy (GWB) were also tested for HPV DNA by PCR.Results: A total of 32 patients (mean age: 36.9 +/- 6.9 years) were included. None of the six samples studied was sufficient on its own to reveal all HPV types detected in a patient. When the samples were analyzed individually, GWB detected an average of 49.5% of total HPV types in a patient. This rate was 50.5% for PS, 40.4% for CS, 31.6% for scrotum, 26.3% for EUM, and 15.8% for FVU samples. The detection rate increased to 75.8% with combined testing of GWB and PS samples, 83.2% with GWB/PS/CS, 90.5% with GWB/PS/CS/scrotum, and 98.9% with GWB/PS/CS/scrotum/EUM samples.Conclusion: No single anatomic region or sample type can detect all HPV types present in circumcised heterosexual men by PCR assay. The detection rate approaches 99% when wart biopsy is combined with swab sampling of the penile shaft, coronal sulcus, scrotum, and external urethral meatus.