title: [Sites of lymphomas].
abstract: Non-Hodgkin's lymphomas are malignant tumours of lymphotic tissue. They predominantly involve the lymph nodes but may affect all organs. The distribution of lymphomas is summarized in the Ann Arbor classification into two types of extranodal tumours: localized primary lymphomas and secondary lymphomas expressing a disseminated disease. The most frequent sites of secondary lymphomas are the bone marrow and the liver, while those of primary lymphomas are the digestive tract and the E.N.T. region. The diagnosis is complicated by the clinical polymorphism of extranodal lymphomas, particularly when the tumour is located in regions such as the brain, where histological samples are difficult to obtain. The prognosis does not rest on the multiplicity of clinical presentations but exclusively on the histology and size of the tumoral mass. Only cerebromeningeal and cutaneous lymphomas require special treatments.
authors.affiliation: Service d'hématologie, hôpital Pitié-Salpêtrière, Paris.
authors.forename: J
authors.initials: J
authors.lastname: Gabarre
authors.forename: B
authors.initials: B
authors.lastname: Bikandou
authors.forename: J L
authors.initials: JL
authors.lastname: Binet
mesh_terms: D005260:Female; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000145:classification / Q000175:diagnosis* / Q000628:therapy; D008297:Male; D011379:Prognosis
vernacular_title: Localisation des lymphomes.