Genetic anomalies of leukocytes Inclusion term(s):Alder (granulation) (granulocyte) anomalyAlder syndromeHereditary leukocytic hypersegmentationHereditary leukocytic hyposegmentationHereditary leukomelanopathyMay-Hegglin (granulation) (granulocyte) anomalyMay-Hegglin syndromePelger-Huët (granulation) (granulocyte) anomalyPelger-Huët syndrome