title: [Incidental finding lymphocytosis. From normal variants up to leukemia].
abstract: A relative or absolute increase of lymphocytes in peripheral blood is a frequent incidental finding. The differential diagnosis of such a finding includes a broad spectrum ranging from normal variations to neoplastic diseases. As for other laboratory parameters lymphocytosis must be interpreted within a given clinical situation. Further diagnostics aim to reliably differentiate between reactive and neoplastic conditions. If a lymphoma or leukemia is suspected this should lead to a rapid hemato-oncological investigation.
authors.affiliation: Klinik I für Innere Medizin, Universitätsklinikum Köln, Kerpener Str. 62, 50937, Köln, Deutschland, karl-anton.kreuzer@uni-koeln.de.
authors.forename: K-A
authors.initials: KA
authors.lastname: Kreuzer
authors.forename: M
authors.initials: M
authors.lastname: Hallek
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D033162:Incidental Findings; D007938:Leukemia / Q000473:pathology*; D018655:Lymphocyte Count; D008214:Lymphocytes / Q000473:pathology*; D008218:Lymphocytosis / Q000473:pathology*