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Facial features in 48,XXYY, 48,XXXY and 49,XXXXY syndromes. Photograph of facial features in children and adults with XXYY (A, B, D, G, H), XXXY (D, F) and XXXXY (E) syndromes. Note features of hypertelorism (A, D, E), epicanthal folds (A, E, G), narrow palpebral fissures (A, C, E, F), strabismus (C, E), flattened occiput (A, C, D) and low frontal hairline (A, B, E, F). Note the sparse facial hair (C, F, G), prominent brow (C, F, G) and narrow shoulders (H) in the adults.
