The purpose of the protocol, is to determine whether lanreotide 30 mg is effective in the treatment of patients with digestive fistulae.

The purpose of this study is to determine whether lanreotide 30mg compared to placebo is effective on the evolution of drainage volume of digestive fistulae in the 72 hours following the beginning of treatment and on the spontaneous closure time of digestive fistulae.

Inclusion Criteria:

• Patient with pancreatic, duodenal, or small intestine fistula
• Patient with simple, externalised fistula
• Patient with fistula for which a medical conservative treatment is considered
• Patient with:
• for pancreatic fistulae: a mean drainage volume more than or equal to 100 ml/24h over 48 hours or more than or equal to 50 ml / 24h over 3 days and a concentration of amylase in the drainage fluid 3 times higher than in the serum over at least 2 or 3 consecutive days respectively,
• for duodenal and small intestine fistulae: a mean drainage volume more than or equal to 100ml/24h over 2 days

Exclusion Criteria:

• Patient expected to require a surgical treatment of the fistula during the study
• Patient having uncontrolled intra-abdominal sepsis; Crohn's disease; radiotherapy lesions of the small bowel; a mesenteric vascular insufficiency; a fistula localised in cancer-infiltrated areas; a distal obstruction; an exposed fistula of the small intestine; or intra-abdominal foreign bodies.
• Patient receiving long-term corticotherapy
• Patient having received any somatostatin analogue as curative treatment of the fistula or any PRF somatostatin analogue within the previous month.
• Patient having previously undergone a transplant