Bevezetés: Az elmúlt években jelentős előrelépések történtek a krónikus lymphocytás leukaemia kezelésében, ugyanis az új innovatív gyógyszerek a TP53-defektust hordozó csoportban is hatékonynak bizonyultak. Ezen betegek maradéktalan azonosításához elengedhetetlen a TP53-defektus mindkét formájának (17p-deletio és TP53-mutációk) vizsgálata. A TP53-mutációk vizsgálata ma a nemzetközi ajánlások részét képezi, segítséget nyújtva az optimális terápiás stratégia megalkotásában. Célkitűzés: Jelen tanulmány célja a TP53-mutációk előfordulásának és a 17p-deletióhoz való viszonyának meghatározása, valamint a mutációk rutindiagnosztikus kimutatására alkalmas szekvenálási eljárás beállítása volt. Módszer: A mutációanalízist Sanger-szekvenálással végeztük el 196, krónikus lymphocytás leukaemiában szenvedő beteg esetében. Eredmények: A betegek 15,8%-ában azonosítottunk TP53-mutációt, ami az esetek felében 17p-deletio nélkül fordult elő. A TP53-defektus mindkét formájának vizsgálatával összesen a betegek 25,4%-ánál azonosítottunk TP53-defektust. Következtetések: A mutációanalízis elvégzésével további 10% magas rizikójú beteg azonosítható, akik számára a legjobb választást az ebben a betegcsoportban is hatékony új célzott terápiák jelentik. Orv. Hetil., 2017, 158(6), 220–228.
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