Most common site for non-Hodgkins lymphoma outside the lymph nodes is
extranodal lymphomas can arise in viually any tissue, they do so most commonly in the gastrointestinal tract, paicularly the stomach Nearly 5% of all gastric malignancies are primarily lynphomas, the most common of which are indolent extranodal marginal zone B cell lymphomas- MALToma( mucosal associated lymphoid tissue). TEXT BOOK OF ROBBINS BASIC PATHOLOGY NINTH EDITION PAGE.571
Liver
Spleen
Stomach
Brain
G.I.T