Neoadjuvant treatment has shown its effectiveness in improving patient's outcome in locally advanced rectal carcinoma. Some patients show excellent response while others do not. We led a retrospective study with a rectal adenocarcinoma who had undergone initial MRI assessment and needed a neoadjuvant chemo-radiotherapy.The studied included 22 men and 8 women with a mean age of 57 years old. Eighteen patients had MRI after neoadjuvant treatment : tumoral response was considered subtle in 3 patients, almost complete in 3 patients and partial in 12 patients.Histological final assessment showed a...