Skip to Content


Pronunciation: ple'o-si-to'sis

Definition: Presence of more cells than normal, often denoting leukocytosis and especially lymphocytosis or round cell infiltration; originally applied to the lymphocytosis of the cerebrospinal fluid present in syphilis of the central nervous system.

[pleo- + G. kytos, cell, + -osis, condition]

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.