List two common features of Tay syndrome.
Tay syndrome is a rare autosomal recessive genetic disorder characterized by congenital ichthyosis and trichothiodystrophy (abnormal brittle hair). Other less common features of this syndrome are photosensitivity, low birth weight, short stature, mental retardation, delayed neuromuscular development and other CNS anomalies, dysplasia of nails, hypoplasia of subcutaneous fatty tissue, prematurely aged facial appearance, hypogonadism, cataracts, osteosclerosis, dysphonia, and increased susceptibility to infections.