label: Primary Choroid Non-Hodgkin Lymphoma
label_lc: primary choroid non-hodgkin lymphoma
description: An indolent, low-grade B-cell non-Hodgkin lymphoma that arises from the choroid. It is characterized by the presence of a diffuse infiltrate of small, round lymphocytes. Lymphoid follicles with germinal centers may be present. In the past these tumors were termed 'reactive lymphoid hyperplasia'. Now they are considered low-grade B-cell lymphomas, most commonly extranodal marginal zone lymphomas of mucosa-associated lymphoid tissue.