Colon composited B cell lymphoma involving intestinal mesenteric lymph nodes combined with adenocarcinoma and schistosome infection: a case report.

Here we reported one rare case of colon composited B cell lymphoma associated with adenocarcinoma. The composited B cell lymphoma composed of extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma) and large B-cell lymphoma. Additionally, adjacent intestinal mesenteric lymph modes were involved. And interestingly, schistosome infection was also found in lymphoma and adjacent tissues. The patient was given a usual local intestinal resection for colon adenocarcinoma. But in the site of one surgical margin, 10 cm away from intestinal carcinoma, we found another mass. Beneath the neoplasm, several swollen intestinal mesenteric lymph nodes were detected. By H&E staining and immunohistochemistry, it was eventually demonstrated the patient suffered complicated neoplasms. So far, there were just several references about colon lymphoma combined with adenocarcinoma. But the present case is the first to report that colon composited B cell lymphoma associated with adenocarcinoma and schistosome infection.