An extremely rare partial autosomal tetrasomy, resulting from a partial triplication of the long arm of chromosome 11, with characteristics of intellectual disability (with severe verbal impairment), short stature with small extremities, keratoconus and distinctive facial features (round, course face, upward slanting palpebral fissures, mild synophrys, large nose with thick ala nasi and triangular tip, large mouth with broad lips, short and smooth philtrum, large protruded chin, ears with adherent lobules). [from SNOMEDCT_US]