Mieke Bus

72 Chapter 5 For biopsy staging, non-diagnostic was indicated when no tumour was present (benign/ND) or invasion could not be determined (Tx/ND) Results Inclusion From December 2011 until December 2014 fifty-one patients were included. In total twen- ty-six patients underwent URS for UTUC combined with OCT, followed by nephroureterec- tomy or segmental ureterectomy. Twenty-four patients had both OCT measurements and biopsies during diagnostic URS. In two patients OCT measurement was performed but no biopsies were taken because of poor visibility caused by bleeding during URS. No patients were excluded because of inadequate or failed OCT measurement (Figure 1). Radical surgery was performed 7.5 ± 5.5 weeks after diagnostic URS with OCT measurement. Patient char- acteristics are listed in Table 1. Table 1: Patient Characteristics Patients (N) 26 Gender M:V 17:9 Age (yr) 65 ± 13 Solitary kindeys (N) 4 pre-surgery kreatinine (µmol/L) 110 ± 45 post-surgery kreatinine (µmol/L) 173 ± 199 CIS:concomitant CIS 2:5 RNU:partial ureterectomy 22:4 Tumour location Pyelum 7 Ureter 11 Both 8