Fig. 1From: Perforation in an intestinal malignant lymphoma casePathological findings at the onset (brain). Hematoxylin-eosin (HE) staining showed a diffuse infiltration of morphological large lymphocytes (magnification 40×) (a). Immunochemical staining revealed positive results for CD20 (b) and CD79a (c) and a negative result for EBER (d)Back to article page