CD4 and B-cell chronic lymphocytic leukemia: Interestingly, another study documented mesenteric lymphadenopathy in 9 of 13 and intestinal thickening in 3 of 13 cats included in a group of cats with clinically defined CLL and a predominant CD4+ T‐cell phenotype.20 Additionally, 2 cats were described as having concurrent low‐grade intestinal lymphoma.20 Although it currently is unknown if cases of low‐grade alimentary lymphoma in cats typically are comprised of CD4+ T cells, our limited histology data suggest that some of our CD4+ T‐cell lymphocytosis cases had an intestinal tissue component.