“…Lymphoreticular neoplasms occur significantly more often in patients with immunodeficiency diseases, as, for instance, Swiss type agammaglobulinaemia, Bruton's disease, ataxia teleangiectatica, and the Wiscott-Aldrich syndrome (Wall and Saslaw, 1955;Page, Hansen, and Good, 1963;Peterson, Cooper, and Good, 1965;ten Bensel, Stadlan, and Krivit, 1966;Goldman, Haggard, McFadden, Ritzmann, Houston, Bratcher, Weiss, Box, and Szekrenyes, 1967;Bierman, 1968) which in turn are associated with sprue and intestinal atrophy (Sanford, Favour, and Tribeman, 1954;Rosecan, Trobaugh, and Danforth, 1955;Wall and Saslaw, 1955). The increased incidence of Giardia lamblia infection in these cases is probably related to a reduced local immunity rather than being the cause of the sprue (McGrath, O'Farrell, and Boland, 1940;Hermans et al, 1966).…”