Table 1

Clinical information for 70 patients with suspected abdominal malignancies.

CharacteristicOriginal
diagnostic set
Independent
test set
Number%Number%
Number of patients5020
Age
  Median6463
  Range29–8624–90
Gender
  Male2448735
  Female26521365
Lesion type
  Malignant44881470
  Benign612630
Tumor subtypes
  Breast24.5214
  Gastrointestinal1330428
  Genitourinary36.517
  Gynecologic49322
  Lung81817
  Pancreatic716322
  Undifferentiated71600
History
  Previous history of cancer3060420
  No previous therapies2042735
  Active treatment1122945
Biopsy site*
  Visceral3672945
  Nonvisceral14281155
Lesion size (axial diameter)
  <1 cm361050
  1 to 3 cm2550630
  >3 cm2244420
Biopsy modality
  Ultrasound14281680
  CT3672420

*Visceral sites include liver, brain, adrenal glands, pancreas, and kidney. Nonvisceral sites include lymph nodes, abdominal wall, breast, bones, and skin.