Journal
BLOOD
Volume 125, Issue 18, Pages 2753-2758Publisher
AMER SOC HEMATOLOGY
DOI: 10.1182/blood-2014-11-567917
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Funding
- National Institute of Allergy and Infectious Diseases
- National Institutes of Health Clinical Center
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Ras-associated autoimmune leukoproliferative disorder (RALD) is a chronic, nonmalignant condition that presents with persistent monocytosis and is often associated with leukocytosis, lymphoproliferation, and autoimmune phenomena. RALD has clinical and laboratory features that overlap with those of juvenile myelomonocytic leukemia (JMML) and chronicmyelomonocytic leukemia (CMML), including identical somatic mutations in KRAS or NRAS genes noted in peripheral blood mononuclear cells. Long-term follow-up of these patients suggests that RALD has an indolent clinical course whereas JMML is fatal if left untreated. Immunophenotyping peripheral blood from RALD patients shows characteristic circulating activated monocytes and polyclonal CD10(+) B cells. Distinguishing RALD from JMML and CMML has implications for clinical care and prognosis.
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