[Invagination of the blind loop--a complication after jejuno-ileal shunting (author's transl)]

Shunting of the jejunum and ileum has been used as a form of therapy in extreme obesity; this may be followed not only by metabolic, but also by surgical complications. A case report is given of a patient, who had an invagination of the excluded segment of the small intestine. Diagnostic difficulties and dangers arising from this complication are discussed as well as surgical techniques allowing to avoid it.