CAMT-MPL: Congenital Amegakaryocytic Thrombocytopenia caused by MPL mutations - Heterogeneity of a monogenic disorder - Comprehensive analysis of 56 patients.

CAMT-MPL: Congenital Amegakaryocytic Thrombocytopenia caused by MPL mutations - Heterogeneity of a monogenic disorder - Comprehensive analysis of 56 patients. Haematologica. 2020 Jul 23;: Authors: Germeshausen M, Ballmaier M Abstract Congenital amegakaryocytic thrombocytopenia caused by deleterious homozygous or compound heterozygous mutations in MPL (CAMT-MPL) is a rare inherited bone marrow failure syndrome presenting as an isolated thrombocytopenia at birth progressing to pancytopenia due to exhaustion of hematopoietic progenitors. The analysis of samples and clinical data from a large cohort of 56 patients with CAMT-MPL resulted in a detailed description of the clinical picture and reliable genotype-phenotype correlations for this rare disease. We extended the spectrum of CAMT causing MPL mutations regarding number (17 novel mutations) and impact. The clinical courses showed a great variability with respect to the severity of thrombocytopenia, the development of pancytopenia and the consequences from bleedings. The most severe clinical problems were (1) intracranial bleedings pre- and perinatally and the resulting long-term consequences, and (2) the development of aplastic anemia in the later course of the disease. An important and new finding was that thrombocytopenia was not detected at birth in a quarter of the patients. The rate of non-hematological abnormalities in CAMT-MPL was higher than described so far. Most of the anoma...
Source: Haematologica - Category: Hematology Authors: Tags: Haematologica Source Type: research