Invariant phenotype and molecular association of biallelic mutant myeloid neoplasia.

Somatic mutations ( ) are frequent in myeloid neoplasia (MN), particularly chronic myelomonocytic leukemia (CMML). includes mostly loss-of-function/hypomorphic hits. Impaired TET2 activity skews differentiation of hematopoietic stem cells toward proliferating myeloid precursors.

Consequences of mutant TET2 on clonality and subclonal hierarchy.

Somatic mutations in TET2 are common in myelodysplastic syndromes (MDS), myeloproliferative, and overlap syndromes. TET2 mutant (TET2) clones are also found in asymptomatic elderly individuals, a condition referred to as clonal hematopoiesis of indeterminate potential (CHIP). In various entities of TET2 neoplasia, we examined the phenotype in relation to the strata of TET2 hits within the clonal hierarchy.

Rational management approach to pure red cell aplasia.

Pure red cell aplasia is an orphan disease, and as such lacks rationally established standard therapies. Most cases are idiopathic; a subset is antibody-mediated. There is overlap between idiopathic cases and those with T-cell large granular lymphocytic leukemia, hypogammaglobulinemia, and low-grade lymphomas.

Molecular features of early onset adult myelodysplastic syndrome.

Myelodysplastic syndromes are typically diseases of older adults. Patients in whom the onset is early may have distinct molecular and clinical features or reflect a demographic continuum. The identification of differences between "early onset" patients and those diagnosed at a traditional age has the potential to advance understanding of the pathogenesis of myelodysplasia and may lead to formation of distinct morphological subcategories.