Table 1. Epidemiology and demographics of small intestine neoplasms.

Histology	Incidence per year	m/f ratio	Risk factors	5 year survival rate
Adenocarcinoma	Overall = 0.4 per 100 000	W m/f = 1.5	Crohn disease,	26.6–39%
	Wm = 30.8%	B m/f = 1.2	coeliac disease,
	Wf = 32.7%		familiary adenomatous
	Bm = 37.2%		polyposis,
	Bf = 45.5%		Meckel diverticulum
Carcinoid	Overall = 0.4 per 100 000	W m/f = 1.4	MEN1	60–76.5%
	Wm = 36.0%	B m/f = 1.6
	Wf = 39.2%
	Bm = 43.9%
	Bf = 39.7%
Lymphoma	Overall = 0.3 per 100 000	W m/f = 1.9	EBV, AIDS (B cell)	8–25%
	Wm = 22.9%	B m/f = 2.3	Coeliac disease (T cell)
	Bm = 11.4%		Chemotherapy
	Wf = 17.9%
	Bf = 7.3%
GIST	Overall = 0.2 per 100 000	W m/f = 1.4	No	45–55%
	Wm = 10.3%	B m/f = 1.4
	Bm = 7.4%
	Wf = 10.2%
	Bf = 7.5%
Metastases	Autopsy series:		Lung cancer	End stage of disease, resection of solitary lesions may prolong survival
	Lung cancer (12%)		Melanoma
	Breast cancer (16%)		Breast cancer
	Melanoma (42%)

W, white; B, black; m, male; f, female; EBV, Epstein-Barr virus; AIDS, acquired immune deficiency syndrome; GIST, gastrointestinal stromal tumour.