View PDF Orbital T-Cell Lymphoma – A Challenging Case

Abstract

Lymphomas are malignant tumors arising as clonal proliferation of either B-lymphocytes, T-lymphocytes or, less commonly, of natural killer (NK) cells and are divided into 2 major categories, namely Hodgkin lymphoma (HL) and non-Hodgkin lymphoma (NHL). While the first is of B-lymphocyte origin, the second is a heterogeneous group of lymphomas of different clonal origin consisting of both B-cell, T-cell and NK-cell lymphomas [1]. Orbital lymphomas constitute 50–60% of ocular adnexal lymphomas and the vast majority are of B-cell origin (97%).