HAEM5:Rosai-Dorfman Disease: Difference between revisions
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This disease is <u>defined/characterized</u> as detailed below: | This disease is <u>defined/characterized</u> as detailed below: | ||
* Rosai–Dorfman disease (RDD) is rare histiocytic disorder characterized by nodal or extranodal accumulation of S100-positive histiocytes/macrophages with emperipolesis. | *Rosai–Dorfman disease (RDD) is rare histiocytic disorder characterized by nodal or extranodal accumulation of S100-positive histiocytes/macrophages with emperipolesis<ref name=":0">John Chan, et al., Rosai-Dorfman disease, in WHO Classification of Tumours Editorial Board, eds, WHO Classification of Tumours, Haematolymphoid Tumours Part A. 5th edition, IARC Press:Lyon, 2024.</ref>. | ||
The <u>epidemiology/prevalence</u> of this disease is detailed below: | The <u>epidemiology/prevalence</u> of this disease is detailed below: | ||
* Rare, occurs in people of all ethnicity, more common in African descent with male predilection. Exception is cutaneous RDD which is more common in Asian women. Nodal RDD occurs in 2nd-3rd decades of life whereas extranodal occurs later in 5th decade. Rare inherited disorders associated with germline mutations in the nucleoside transporter gene ''SLC29A3'' (H syndrome / Faisalabad histiocytosis), and FAS deficiency with heterozygous germline mutations in ''FAS'' (''TNFRSF6'') (autoimmune lymphoproliferative syndrome) predispose to familial RDD. | *Rare, occurs in people of all ethnicity, more common in African descent with male predilection. Exception is cutaneous RDD which is more common in Asian women. Nodal RDD occurs in 2nd-3rd decades of life whereas extranodal occurs later in 5th decade. Rare inherited disorders associated with germline mutations in the nucleoside transporter gene ''SLC29A3'' (H syndrome / Faisalabad histiocytosis), and FAS deficiency with heterozygous germline mutations in ''FAS'' (''TNFRSF6'') (autoimmune lymphoproliferative syndrome) predispose to familial RDD<ref name=":0" />. | ||
The <u>clinical features</u> of this disease are detailed below: | The <u>clinical features</u> of this disease are detailed below: | ||
Signs and symptoms - painless, slow-growing lymphadenopathy; B-symptoms may be present in 1/3 of patients | Signs and symptoms - painless, slow-growing lymphadenopathy; B-symptoms may be present in 1/3 of patients<ref name=":0" /> | ||
The <u>sites of involvement</u> of this disease are detailed below: | The <u>sites of involvement</u> of this disease are detailed below: | ||
* Nodal: Cervical region lymph nodes | *Nodal: Cervical region lymph nodes<ref name=":0" /> | ||
* Extranodal: Mostly head and neck, skin, and CNS | *Extranodal: Mostly head and neck, skin, and CNS<ref name=":0" /> | ||
The <u>morphologic features</u> of this disease are detailed below: | The <u>morphologic features</u> of this disease are detailed below: | ||
* Gross examination: Lymph nodes are enlarged and matted, might form multinodular masses. | *Gross examination: Lymph nodes are enlarged and matted, might form multinodular masses<ref name=":0" />. | ||
* Histopathology: Lymph nodes with sinus expansion shows RDD cells - distinctive large histiocytes with emperipolesis (the presence of intact lymphocytes, but also plasma cells, neutrophils, and erythrocytes within the histiocyte cytoplasm); Mixed infiltration by small B cells, T cells and numerous polytypic plasma cells. | *Histopathology: Lymph nodes with sinus expansion shows RDD cells - distinctive large histiocytes with emperipolesis (the presence of intact lymphocytes, but also plasma cells, neutrophils, and erythrocytes within the histiocyte cytoplasm); Mixed infiltration by small B cells, T cells and numerous polytypic plasma cells<ref name=":0" />. | ||
The <u>immunophenotype</u> of this disease is detailed below: | The <u>immunophenotype</u> of this disease is detailed below: | ||
Positive (universal) - S100-highlights emperipolesis, OCT2, phosphorylated ERK and cyclin D1, CD68 and CD163 | Positive (universal) - S100-highlights emperipolesis, OCT2, phosphorylated ERK and cyclin D1, CD68 and CD163<ref name=":0" /> | ||
Negative (universal) - CD1a and CD207 (langerin) | Negative (universal) - CD1a and CD207 (langerin)<ref name=":0" /> | ||
==Links== | ==Links== | ||
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==References== | ==References== | ||
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==Notes== | ==Notes== | ||