[Development of a squamous cell carcinoma of the urinary bladder after intravesical condylomas]

The occurrence of intravesical condylomata acuminata has been described as a fairly uncommon, benign epithelial lesion. Reports on progression into a muscle-invasive carcinoma of the bladder are rare.

We present the case of a 68-year-old man who had a history of intravesical condylomata acuminata over several years and developed a muscle-invasive squamous cell carcinoma of the bladder. Having undergone several transurethral resections, but failed to receive intravesical instillation therapy or continuous follow-up examinations, the patient visited our department. After being diagnosed with ichthyosis vesicae, the patient had a rapid disease progress and developed a muscle-invasive squamous cell carcinoma of the urinary bladder within 3 months. He underwent radical cystectomy.

The carcinogenic potency of the human papilloma virus is well known for carcinomas of the male and female genitals. The occurrence of intravesical condylomata is rare. They are commonly perceived as benign lesions and, therefore, mainly treated symptomatically. Our case shows that progression to a highly aggressive muscle-invasive squamous cell carcinoma is possible.

The diagnosis of intravesical condylomata acuminata requires stringent urologic follow-up examinations including biopsy of suspicious lesions and stage-appropriate surgical management in the case of an invasive carcinoma.