Table 1 Patient Characteristics (n = 31 Patients)

Male, n(%)

20 ( 64.5)

Age at FAPI scan, mean ± SD, years

58.2 ± 8.5

Jaundice, n(%)

12 ( 38.7)

Clinical indication for PET/CT

 Clarifying the nature of the lesion, n(%)

20 ( 64.5)

 Initial staging, n(%)

9 ( 29.0)

 Restaging, n(%)

2 ( 6.5)

Blood Results

 Median (25^th-75^th percentile range) CA19-9^a, U/ml

89.2 ( 35.9–144.8)

 Median (25^th-75^th percentile range) Serum Amylase, U/l

60.7 ( 33.8–83.8)

Location of the primary lesion, n(%)

 Head

16 ( 51.6)

 Body

10 ( 32.3)

 Tail

5 ( 16.1)

 Cholangiectasis observed by Al¹⁸F-NOTA-FAPI-04 PET/CT, n(%)

14 ( 45.1)

 Expansion of the pancreatic duct

22 ( 71.0)