Erayga lymphocytic waxa uu tilmaamayaa shay la xidhiidha ama lagu garto lymphocytes, kuwaas oo ah nooc ka mid ah unugyada dhiiga cad oo door muhiim ah ka ciyaara habka difaaca jirka. Gaar ahaan, lymphocytic waxaa loola jeedaa joogitaanka ama dhaqdhaqaaqa lymphocytes, kuwaas oo noqon kara unugyada B ama unugyada T, oo ku lug leh soo saarista unugyada difaaca jirka, iyo sidoo kale aqoonsiga iyo burburinta walxaha shisheeye sida fayrasyada iyo bakteeriyada. Erayga lymfocytic waxaa inta badan loo adeegsadaa xaaladaha caafimaad ee saameeya habka difaaca jirka, sida lymphocytic leukemia, lymphocytic lymphoma, iyo xanuunada difaaca jirka.