CD34 and myelodysplastic syndrome: In particular, a 40% decreased expression of LUC7L2 and other genes from the long arm of chromosome 7, compared to healthy controls., is reported in the CD34+ HSC from MDS patients, including some with monosomy 7 or del(7q) demonstrating the haploinsufficiency of this gene in MDS with monosomy 7 or del(7q) [83].