NCIt definition : A cytogenetic abnormality that refers to loss of all or part of the long arm of chromosome
7 (7q). It is associated with the development of chronic myelomonocytic leukemia with
eosinophilia, refractory anemia with excess blasts, refractory anemia with multilineage
dysplasia, and refractory anemia with multilineage dysplasia and ringed sideroblasts.;