[Unusual clinical course of malignant lymphoma(author's transl)].

Primary malignant lymphoma of the gastrointestinal tract and intestinal involvement in diffuse lymphoproliferative diseases are far more common than generally believed. A typical clinical course of these disorders may rose considerable diagnostic problems. Scirrhous growth patterns, diffuse gastrointestinal polyposis and multiple colonic ulcers are presented as rare variants of malignant lymphoma of the digestive tract.