[Early postoperative mitomycin C instillation: when and how?].

The rationale for intravesical chemotherapy in the treatment of superficial bladder tumours is based on the knowledge of their natural history, particularly the propensity of a majority of tumours to relapses, while only a small proportion of these tumours present a risk of progression. The objective of intravesical chemotherapy is to prevent tumour implantation on the site of resection and to eliminate any residual disease responsible for recurrences; this treatment therefore constitutes "chemoprophylaxis". The objective of this technical note is to recall the practical modalities of early postoperative mitomycin C instillation with particular emphasis on two technical points.