Table 4.

Presentation and outcomes of patients based on maximum cyst size and growth rate. Data are presented as n (%) or as median (range).

Variable	Maximum cyst size			Cyst growth rate
	< 50 mm	≥ 50 mm	P-value	<5mm/year	>5mm/year	P-value
n	38	54		44	15
Age at diagnosis, years	52 (14–81)	37 (20–76)	0.0003	48 (14–83)	36 (19–68)	0.2844
Women	23 (61%)	29 (54%)	0.5309	26 (59%)	7 (47%)	0.5485
Symptoms of mass effect	0 (0%)	9 (17%)	0.0093	3 (7%)	2 (13%)	0.5933
Initial cyst size, mm	35 (5–49)	61 (20–88)	<0.001	48 (11–104)	46 (17–100)	0.5833
Unenhanced CT attenuation, HU	20 (0–83)	19 (9–70)	0.7643	20 (5–83)	20 (9–50)	0.8733
Cyst growth rate#, mm per year	+0.6 (−2.5 to 6)	+3.6 (−9 to 27)	0.0887
Change in cyst size#,$, mm	+3 (−38 to 30)	+12.5 (−60 to 111)	0.0495	+2.3 (−60 to 73)	+39 (6 to 111)	<0.0001
Surgical intervention, n (%)	12 (32%)	34 (63%)	0.0056	10 (23%)	13 (87%)	<0.0001

Abbreviations used: CT = computed tomography; HU = Hounsfield units

P value < 0.05 is significant

^#Available for 59 patients with more than 6 months of imaging follow-up

^$Difference between cyst size on last and the first imaging studies