Catalog

Xq28 duplication

No MMS code

Link to WHO Definition

Xq28 duplication – http://id.who.int/icd/entity/1019622413

Distal Xq duplications refer to chromosomal disorders resulting from involvement of the long arm of the X chromosome (Xq). Clinical manifestations vary widely depending on the gender of the patient and on the gene content of the duplicated segment. The most frequently reported distal duplications involve the Xq28 segment and yield a recognizable phenotype including distinctive facial features (premature closure of the fontanels or a ridged metopic suture, a broad face with full cheeks, epicanthal folds, large ears, a small and open mouth, ear anomalies, a pointed nose, an abnormal palate and facial hypotonia), major axial hypotonia, severe developmental delay, severe feeding difficulties, abnormal genitalia and susceptibility to infections.