Skip to main content

Table 3 Association of patient and tumor factors with likelihood of recommending active surveillance and specific cut-offs viewed as most appropriate for active surveillance (N = 127 for Bosniak III; N = 124 for Bosniak IV)

From: Management of complex renal cysts in Canada: results of a survey study

 Significant impact on likelihood to recommend active surveillance reported
N (%)
CharacteristicsBosniak IIIBosniak IV
Patient factors
 ▪Age121 (95.3)104 (84.5)
Cutoff
 > 55 years old6 (5.0)3 (2.9)
 > 65 years old35 (28.9)17 (16.4)
> 75 years old80 (66.1)84 (80.8)
 ▪Presence of comorbidities121 (96.0)105 (85.4)
Tumor factors
 ▪Cyst size72 (56.7)59 (48.0)
Cutoff
 < 4 cm56 (77.8)54 (91.5)
 < 7 cm16 (22.2)5 (8.5)
 ▪Size of nodular componentN/A86 (69.9)
Upper limit cutoff, median (IQR) 2 cm (1–3 cm)
 ▪Number of septa/calcification32 (25.2)25 (20.7)
Cutoff
 ≤ 27 (22.9)9 (36.0)
 ≤ 320 (62.5)12 (48.0)
 ≤ 4 or 55 (15.7)4 (16.0)
 ▪Thickness of septa/calcification56 (44.1)31 (25.2)
Upper limit cutoff, median (IQR)3 mm (2–5 mm)5 mm (3–5 mm)
 ▪Cyst wall nodularity95 (74.8)N/A