[MALT lymphoma of large intestine as multiple large polypoid lesions]

We report a case of mucosa associated lymphoid tissue (MALT) lymphoma in the large intestine in a 38-year-old Japanese female. She developed a dull pain in the right lower abdomen and was found to have ileocecal intussusception. The terminal ileum, cecum and ascending colon were resected. Macroscopically, multiple polypoid lesions were found. Although some authors reported that MALT lymphoma of the colon tend to be solitary, the present case showed seven lesions. Two of the polypoid lesions in the present case were marked large. No such large polypoid MALT lymphoma has been described to our knowledge. A histological and immunohistochemical study revealed those seven lesions to be low grade B cell lymphomas of MALT type.