日本性感染症学会誌 Journal of Japanese Society for Sexually Transmitted Infections

We report a case of horizontal transmission of genital condyloma acuminatum (CA) from a 40-year-old father to his three-year-old son. In children, CA is rare and depends on factors such as living conditions, transmission mode, and treatment. In the present case, the father contracted the disease through sexual transmission from a sex worker, and both vertical transmission and sexual abuse were ruled out. Both the father and the son presented with black papules on their penis glans and perianal region. Since the father routinely bathed the son by placing him on his knees, it was presumed that the son contracted the disease via contact with the father’s lesions. In both the patients, lesion biopsies were positive for CA using in situ hybridization with human papillomavirus DNA types 6/11. It was therefore concluded that the disease was horizontally transmitted from the father to his son.