carcinoid tumor

• "rule of one-third"
  • 1/3 of GI carcinoid in SB
  • 1/3 ==> mets
  • 1/3 have 2nd malignancy
  • 1/3 multiple

• 90% from distal ileum or appendix
• 90% of appendicial tumors

• desmoplastic reaction ==> kinking + angulation of SB
• angio: intensely vascular lesions

Cf: carcinoid syndrome

© 2002, C.E. Kahn, Jr.
2002-04-18