NHL associated with SS (hematoxylin-eosin stains). (A) Case no. 13. Low-grade B-cell lymphoma of MALT type in the stomach, composed mainly of centrocyte-like cells with a few small lymphocytes and plasma cells. (B) Case no. 15. Low-grade B-cell lymphoma of MALT type in the parotid. Lymphoepithelial lesions are numerous, surrounded by centrocyte-like cells. (C) Case no. 6. Remnants of a germinal center in a low-grade B-cell lymphoma of MALT type in the parotid.

(D) Case no. 10. Immunocytoma in lymph node. The infiltrate is composed of small lymphocytes, plasma cells and blasts. (E) Case no. 14. Monocytoid B-cell lymphoma in a cervical lymph node with a monocytoid component located in dilated sinuses.

(F ) Case no. 2. High-grade B-cell lymphoma in the stomach (centroblastic lymphoma; upper), with remnants of low-grade lymphoma of MALT type (lower).