Primary dural lymphoma mimicking a chronic epidural hematoma. Differential diagnosis of two rare conditions

Abstract

PrimaryCentralNervousSystemLymphoma(PCNSL) is anextraodal Non-Hodgkin Lymphoma (NHL) that arises in the brain arenchyma, eyes, meninges, or spinal cord in the absence of lymhoma outside of the CNS at the time of the diagnosis. Pure primary leptomeningeal lymphoma (PLML) is a subtype f PCNSL, it represents less than 0.1% of all NHL. Primary dural ymphoma (PDL) is a subentity of PLML and it is described as dura ater involvement with no systemic disease. PDL represents less han 1% of all brain lymphomas. The diagnosis of PDL is very difcult because the imaging appearance usually is of an extra-axial ass mimicking a meningioma [1] or a hematoma [2,3]. We report case of PDL with immunophenotype of chronic lymphocytic eukemia/small lymphocyte lymphoma (CLL/SLL), which was iniially clinically diagnosed as a chronic extradural hematoma (EDH). n literature this is the third case of PDL mimicking hematoma and he seventh case of primitive CLL/SLL of the dura.