[Primary rectal lymphoma: value of rectal endosonography]

The authors report a case of primary rectal lymphoma characterized by dyspareunias and a raised erythematous rectal mucosa visible at rectoscopy. They stress the difficulty of the diagnosis, requiring deep biopsies, and the advantage of endorectal sonography. Its efficacy in defining the parietal and depth spread is evaluated between 90-95 p. cent, while it is lower (72%) regarding node invasion.