Alder-Reilly anomaly

(al′dĕr-rī′lē)

[Albert von Alder, Swiss hematologist, 1888-1951; William Anthony Reilly, U.S. pediatrician, b. 1901.]
Large dark leukocyte granules that stain lilac. They consist of mucopolysaccharide deposits and are indicative of mucopolysaccharidosis.