Recurrence of condylomata acuminata of the urethra after conventional and fluorescence-controlled Nd:YAG laser treatment.
OBJECTIVE
To report our experience with conventional and fluorescence-controlled neodymium:yttrium-aluminum-garnet (Nd:YAG) laser therapy of urethral condylomata. Urethral condylomata can sometimes only be reached by endoscopy and are in general very susceptible to recurrence. They must therefore be considered as a therapeutic problem that has not yet been resolved.


METHODS
One hundred sixty-eight patients with urethral condylomata were treated with the Nd:YAG laser (93 men using conventional white-light endoscopy and 75 men using fluorescence control after topical application of 5-aminolevulinic acid). The relapse characteristics were investigated according to the location and extent of the urethral lesions and with regard to the different endoscopy techniques.


RESULTS
Of all patients, 35.7% developed recurrences of urethral condylomata after laser therapy. These were mainly located on the meatus and in the distal urethra. Only 4.8% of patients had proximal condylomata, and this was only seen in people with distal urethral involvement. Extensive, complete, or semicircularly arranged condylomata developed recurrence and complications (eg, strictures) more frequently after laser therapy. Significantly fewer recurrences (21.3% versus 47.3%) were observed in fluorescence-controlled laser therapy in a retrospective comparison with laser therapy under conventional conditions with a corresponding extent of human papillomavirus lesions.


CONCLUSIONS
Nd:YAG laser therapy enables a specific topical clearance of human papillomavirus lesions at different locations in the urethra. 5-Aminolevulinic acid-induced fluorescence diagnostics enhances the effectiveness of Nd:YAG laser therapy of human papillomavirus lesions. Urethral instrumentation of any kind leads to viral contamination of the proximal urethra.
Zaak
D
D
Department of Urology, University of Munich-Grosshadern, Munich, Germany.
Hofstetter
A
A
Frimberger
D
D
Schneede
P
P
D000287:Administration, Topical; D000293:Adolescent; D000328:Adult; D000535:Aluminum / Q000627:therapeutic use*; D000622:Aminolevulinic Acid / Q000008:administration & dosage / Q000627:therapeutic use; D003218:Condylomata Acuminata / Q000175:diagnosis / Q000188:drug therapy / Q000601:surgery*; D005453:Fluorescence; D006801:Humans; D053685:Laser Therapy / Q000379:methods* / Q000706:statistics & numerical data; D008297:Male; D008875:Middle Aged; D009354:Neodymium / Q000627:therapeutic use*; D012008:Recurrence; D012189:Retrospective Studies; D016896:Treatment Outcome; D014522:Urethral Diseases / Q000175:diagnosis / Q000188:drug therapy / Q000601:surgery* / Q000821:virology*; D013521:Urologic Surgical Procedures, Male / Q000379:methods / Q000706:statistics & numerical data; D015019:Yttrium / Q000627:therapeutic use*
D009354:Neodymium; D015019:Yttrium; D000622:Aminolevulinic Acid; D000535:Aluminum