“…The overall percentage of NHLs coded as being of extranodal origin is between 25% and 35% in most countries. Frequently, the origin of primary extranodal NHLs can be ascribed to one given organ system or site, with the most common extranodal sites represented by the stomach, skin (Kadin & Carpenter, 2003;Hsi, 2004), and small intestine; also breast (Grubstein et al, 2005), thyroid (Widder & Pasieka, 2004), lung (Cohen et al, 2004), heart (Chalabreysse et al, 2002), liver (Eom et al, 2004), genitourinary tract (Kirk et al, 2001;Novella et al, 2001;Kahlifa, Buckstein & Perez-Ordonez, 2003; Khaitan et al, 2004;Heredia et al, 2005;Yildirim, 2005), adrenals (Singh et al, 2004) and bone could primarily affected. However, a heterogeneous group of NHLs, including DLBCL, Burkitt's lymphoma, and mucosa-associated lymphoma tissue (MALT) lymphoma, involves multiple extranodal sites at presentation (Economopoulos et al, 2005).…”