Sigma’s stenosis rappresent a frequent pathology, but it’s very difficult to have a pre-operatory diagnosis about the nature of these stenosis, not with stending the introduction of more sophysticated instruments of diagnosis. In this work we present 9 cases of sigma stenosis; some of these with a common etiology and other very interesting for their rare and unusual origins. The patients were underwent to a different timing of diagnosis and therapy based on clinical history and diagnostic hypotesys; our experiences demonstrate that the clinical intuition is really useful for a correct diagnosis in the patients with a sigma’s stenosis and conseguentely, in order to plan the correct therapy.