ABSTRACT
The plastic linit is defined-as the infiltration of the wall of a hollow body by a diffuse anaplastic cancer . Its most frequent seat is gastric. The rectal primitive linit is very exceptional. All diagnosis, therapeutics and prognosis aspects this affection were discuss. A 12 year ad girl is hospitalized for primitive rectal linit. She was treated by abdominoperineale amputation after radiochemotherapy. The patient have received adjunct chematherapy. The out come was simple without recurrence after 4 months. The plastic linit of the rectum is a little differentiated shape of adenocarcinoma. The diagnosis is provided on a major biopsy and the absence of gastric attack. The farecast is very bad in spite of intencive treatment, associating surgery, radiotherapiy and chemotherapy