duodenal tumors

• 90% benign

• in 2nd + 3rd portion: 50% malignant
• in 4th portion: most malignant
• of malignancies: 80-90% --> adenoCa

DDx:

• benign
  • tubular adenoma
  • leiomyoma
  • lipoma
  • hamartoma (Peutz-Jeghers)
  • prolapsed antral polyp
  • Brunner's gland "adenoma" (really hypertrophy + hyperplasia)
• malignant
  • adenoCa (80-90% of malignant lesions)
  • villous adenoma (pre-malignant)
  • carcinoid / islet-cell tumor

© 2002, C.E. Kahn, Jr.
2002-04-18