title: Rosai-Dorfman disease: a report of eight cases in a tertiary care center and a review of the literature.
abstract: Rosai-Dorfman disease (RDD) is a nonmalignant histiocytic disorder of unknown origin that is extremely rare. By immunohistochemistry, the RDD cells are characteristically S-100 positive and CD1a negative. Emperipolesis is a common histopathological finding, although not specific for RDD. Lymph node and cutaneous manifestations are most frequent, but diverse organs can be affected. The clinical course is unpredictable regardless of treatment. Here, we present a series of 8 cases presenting lymph node and/or cutaneous lesions. Lymph node involvement was seen in diverse regions, including mediastinal and retroperitoneal. The treatment response to steroids was diversified, and the chemotherapy response was disappointing. Associated autoimmune diseases (Sjögren syndrome and antiphospholipid syndrome) were observed in 2 patients. Regardless of therapy modality, these patients exhibited a favorable prognosis in a follow-up duration that ranged from 15 to 80 months.
authors.affiliation: Programa de Pesquisa em Hemato-Oncologia Molecular, Instituto Nacional de Câncer, Rio de Janeiro, RJ, Brasil.
authors.forename: R C
authors.initials: RC
authors.lastname: Maia
authors.affiliation: Divisão Clínica, Hospital do Câncer-I, Instituto Nacional de Câncer, Rio de Janeiro, RJ, Brasil.
authors.forename: E
authors.initials: E
authors.lastname: de Meis
authors.affiliation: Divisão de Anatomia Patológica, Instituto Nacional de Câncer, Rio de Janeiro, RJ, Brasil.
authors.forename: S
authors.initials: S
authors.lastname: Romano
authors.affiliation: Serviço de Hematologia, Hospital do Câncer-I, Instituto Nacional de Câncer, Rio de Janeiro, RJ, Brasil.
authors.forename: J A
authors.initials: JA
authors.lastname: Dobbin
authors.affiliation: Programa de Pesquisa em Hemato-Oncologia Molecular, Instituto Nacional de Câncer, Rio de Janeiro, RJ, Brasil.
authors.forename: C E
authors.initials: CE
authors.lastname: Klumb