It is now well demonstrated that cytogenetic and molecular testing are valuable tools for the diagnostic, prognostication, and decision of treatment strategy in lymphoproliferative disorders. Here, we will give an overview of the genetic tests that represent current and future clinical assessment tools in the context of lymphoid malignancies. This review has been divided into two distinct but complementary parts. Part I will address the genetic aspects of low grade B-cell lymphomas and will very briefly describe the different technical methods that can be used in routine practice for the clinical management of lymphoid malignancies. Part II will cover aggressive B- and T/NK-cell lymphomas as well as Hodgkin lymphoma and will be published subsequently.

(BELG J HEMATOL 2018;9(6):225–36)