NCIt definition : A disorder characterized by lymphoid hyperplasia in the lymph nodes. There are two
histologic variants recognized: the hyaline-vascular type and the plasma cell type.
In the hyaline vascular type there are hyalinized vessels present in the lymphoid
follicles. In the plasma cell type there is pronounced plasma cell proliferation.
Clinically, the disease may be localized; manifested with localized lymphadenopathy,
or multicentric; manifested with generalized lymphadenopathy, fever, organomegaly,
and sometimes POEMS syndrome. In contrast to patients with localized disease who are
usually cured following resection of the lesion, patients with the multicentric form
of the disease may follow a progressive clinical course, complicated by infection,
Kaposi sarcoma or lymphoma.;
Alternative definition : NCI-GLOSS: A rare disorder in which growths that are benign (not cancer) develop in
lymph node tissue.;