Prevalence of HNPCC in a series of consecutive patients on the first endoscopic diagnosis of colorectal cancer: a multicenter study. The Italian Collaborative Group.

Background And Study Aims: It is difficult to measure the prevalence of hereditary non-polyposis colorectal cancer (HNPCC) in geographical areas that do not have tumor registers, as is the case in the present study, and it was therefore decided to assess the prevalence in Italy using different methods.

Patients And Methods: The pedigree was established for 485 of 501 colorectal cancer patients diagnosed with colorectal carcinomas. Patients were included consecutively in 13 gastroenterology centers; they had not taken part in prevention examinations.

Computed tomographic and magnetic resonance imaging of chronic odontoid fractures.

Study Design: The analysis of the imaging characteristics found in chronic odontoid fractures.

Objectives: To determine the efficacy of computed tomography and magnetic resonance imaging in diagnosing a chronic odontoid fracture.

Summary Of Background Data: Radiographic examination of the cervical spine is intrinsic to the evaluation of all patients with blunt trauma.