The Centers for Disease Control and Prevention says that most sexually active men in the United States will have genital human papillomavirus, HPV, at one point in their lives. HPV is a common virus, with more than 100 types, 40 of which can be sexually transmitted. The virus can manifest in a variety of ways, from warts to cancer.
Warts
Considered low-risk, HPV-6 and HPV-11 are responsible for the development of genital warts. The Centers for Disease Control says the warts can appear on the penis, the testicles, in the groin area, on the the thighs and on the anus. These growths do not usually hurt but can cause itching and discharge. Anal warts may go undetected. Genital warts usually appear a few weeks or months after sexual contact.
Penile Cancer
HPV infection is found in about half of all penile cancers, although it's not clear what role the virus plays in the development of this cancer, according to the American Cancer Society. Signs of the cancer include a build-up of tissue on the penis or a growth or sore on the penis. The sore may bleed. Sometimes penile cancer has no symptoms, according to the Centers for Disease Control.
Anal Cancer
Men who have been infected with HPV have an increased risk of developing anal cancer. Signs of anal cancer include bleeding from the rectum or a lump near the anus, pain or pressure in the area of the anus, itching or a discharge and a change in bowel habits, according to the National Cancer Institute. Diagnosis may include an ultrasound and biopsy,
Oral Cancer
HPV may account for about one-fourth of all mouth and throat cancers. Such cancers are often found during routine dental exams. The patient is then referred to his primary heath-care provider or a specialist, who can do a more detailed exam to determine if the cancer is present.
