Observational Study
Copyright ©The Author(s) 2022.
World J Clin Cases. Jun 16, 2022; 10(17): 5667-5679
Published online Jun 16, 2022. doi: 10.12998/wjcc.v10.i17.5667
Table 1 Baseline and demographic characteristics of patients and cysts
Characteristics
n = 98
Males (%)33 (33.7)
Females (%)65 (66.3)
Median age at diagnosis (IQR)69 (63-75)
Familial history (%)9 (9.2)
History of diabetes (%)16 (16.3)
Diabetes onset during follow-up (%)0 (0.0)
Median follow-up [mo (IQR)]40.5 (24-72)
Former smokers (%)14 (14.3)
Active smokers (%)8 (8.1)
Never smoked (%)76 (77.6)
Multifocal57 (58.2)
Largest cyst localizationHead (%)44 (44.9)
Isthmus/body (%)40 (40.8)
Tail (%)14 (14.3)
Median cyst sizea [mm (IQR)]9 (6-15)
b [mm (IQR)]10 (6.75-16)
c [mm (IQR)]10 (6-16)
Volume [cm3 (IQR)]0.54 (0.17-1.65)
EUS19 (19.4)
Median time to EUS (IQR)6 (0-31.5)
FNA (%)9 (47.4)
Cyst fluid amylases [IU/L (IQR)], n = 5289 (69.25-1725.25)
Cyst fluid CEA [IU/L (IQR)], n = 6166 (8.55-24062.75)
Serum CA19.9 [IU/L (IQR)], n = 2525.2 (6.1-58.7)
Serum CEA [IU/L (IQR)], n = 222.15 (1.27-2.92)
Table 2 Baseline and demographic characteristics of patients and cysts: subgroups

Non-worrisome features (n = 88)
Worrisome features (n = 10)
P value
Males (%)31 (35.2)2 (20.0)0.540234
Females (%)57 (64.8)8 (80.0)0.540234
Median age at diagnosis (IQR)70 (63.5-74.75)67 (59.75-76.25)0.58232
Familial history (%)8 (9.1)1 (10.0)0.628786
History of diabetes (%)14 (15.9)2 (20.0)0.904665
Diabetes onset during follow-up (%)0 (0.0)0 (0.0)-
Median follow-up [mo (IQR)]37.5 (23.25-71)69.5 (46.5-94)0.01828
Former smokers (%)11 (12.5)3 (30.0)0.306885
Active smokers (%)8 (9.1)0 (0.0)0.738111
Never smoked (%)69 (78.4)7 (70.0)0.83833
Multifocal52 (59.1)5 (50.0)0.830551
Largest cyst localizationHead (%)39 (44.3)5 (50.0)0.994538
Isthmus/body (%)35 (39.8)5 (50.0)0.776364
Tail (%)14 (15.9)0 (0.0)0.746616
Median cyst sizea [mm (IQR)]9 (6-13)19 (11.25-21.25)0.0035
b [mm (IQR)]10 (6-15)18 (10.75-20.75)0.00652
c [mm (IQR)]9.5 (6-15)22.5 (12-27.65)0.00424
EUS14 (15.9)5 (50.0)0.030618
Median time to EUS (IQR)3 (0-18.25)29 (5.5-69.5)0.22628
Serum CA19.9 [IU/L (IQR)], n = 256.2 (5.6-24.2)23.8 (6.2-37.9)0.1556
Serum CEA [IU/L (IQR)], n = 222.15 (1.28-2.93)2.15 (1.55-2.75)0.93624
Table 3 Patients who underwent surgery

Sex, age
Final cyst volume (cm3)
Growth rate (cm3/yr)
MPD (mm)
Location
CA19.9 (IU/L)
Time to surgery (mo)
Histopathology
Patient AF, 6828.7333.91< 5Isthmus33.285LGD
Patient BF, 7414.7024.27< 5Head22.565LGD
Table 4 Baseline cysts size

All (n = 98)
Non-worrisome features (n = 88)
Worrisome features (n = 10)
P value
a [mm (IQR)]9 (6-15)9 (6-13)19 (11.25-21.25)0.0035
b [mm (IQR)]10 (6.75-16)10 (6-15)18 (10.75-20.75)0.00652
c [mm (IQR)]10 (6-16)9.5 (6-15)22.5 (12-27.65)0.00424
volume [cm3 (IQR)]0.54 (0.17-1.65)0.45 (0.15-1.28)5.28 (1.10-6.30)0.00222
Table 5 Final cysts size

All (n = 98)
Non-worrisome features (n = 88)
Worrisome features (n = 10)
P value
a [mm (IQR)]9 (6-16)9 (6-13.75)23 (13.5-27.5)0.00288
b [mm (IQR)]12 (7-18)11 (7-16.75)28 (19.25-37.5)0.00054
c [mm (IQR)]11 (7-18)10.5 (6.25-16)29 (15.75-38.75)0.0003
volume [cm3 (IQR)]0.58 (1.76-2.02)0.52 (0.17-1.63)10.17 (2.72-19.36)0.0005
Table 6 Total cysts growth

All (n = 98)
Non-worrisome features (n = 88)
Worrisome features (n = 10)
P value
a [mm (IQR)]0 (-0.25-2)0 (-0.75-1.75)2 (-0.5-8.75)0.0601
b [mm (IQR)]0 (0-3)0 (0-2)10 (-0.25-14.25)0.01016
c [mm (IQR)]0 (0-3)0 (-1-2)5 (3.25-14)0.00008
Volume [cm3 (IQR)]0.02 (-0.01-0.70)0 (-0.03-0.24)4.01 (0.83-13.87)< 0.00001
Volume increased (%)28 (28.6)18 (20.4)10 (100.0)< 0.00001
Volume unchanged or reduced (%)70 (71.4)70 (79.6)0 (0.0)< 0.00001
Table 7 Yearly cysts growth rate

All (n = 98)
Non-worrisome features (n = 88)
Worrisome features (n = 10)
P value
a [mm/yr (IQR)]0 (-0.04-0.73)0 (-0.11-0.6)0.63 (-0.11-1.275)0.14156
b [mm/yr (IQR)]0 (0-1.33)0 (0-1.09)1.55 (-0.53-3.52)0.0394
c [mm/yr (IQR)]0 (0-0.99)0 (-0.29-0.71)1.96 (0.64-2.47)0.00152
Volume [cm3/yr (IQR)]0 (-0.01-0.27)0 (-0.02-0.17)1.12 (0.28-2.65)0.0001
Table 8 First-year cysts growth and development of worrisome features

All (n = 74)
Non-worrisome features (n = 64)
Worrisome features (n = 10)
P value
a [mm (IQR)]0 (0-0.56)0 (0-0.5)0.47 (-0.11-1.1)0.22628
b [mm (IQR)]0 (0-1.13)0 (0-0.14)0.4 (-1.12-2.81)0.64552
c [mm (IQR)]0 (0-0.94)0 (0-0.74)1.4 (0-2.47)0.00932
Volume [cm3 (IQR)]0 (-0.02-0.18)0 (-0.04-0.08)0.46 (0-1.62)0.00634
Volume increased (%)35 (47.3)28 (43.7)7 (70.0)0.227942
Volume unchanged or reduced (%)39 (52.7)36 (56.3) 3 (30.0)0.227942