| A rare chromosomal anomaly disorder resulting from the partial duplication of the proximal long arm of chromosome 13 with a highly variable phenotype. The disease is principally characterized by increased polymorphonuclear leucocyte projections and persistence of fetal hemoglobin, growth and developmental delay and craniofacial dysmorphism (including microcephaly, depressed nasal bridge, stubby nose, low-set, malformed ears, cleft lip/palate, micrognathia). Strabismus, clinodactyly and undescended testes in males may also be associated. |
