1p36 deletion syndrome is a chromosomal anomaly characterized by distinctive facial dysmorphic features, hypotonia, developmental delay, intellectual disability, seizures, heart defects, hearing impairment and prenatal onset growth deficiency. The disease is Orphanet_1606 (1p36 deletion syndrome). Also known as: Del(1)(p36), Deletion 1p36, Deletion 1pter, Monosomy 1p36, Monosomy 1pter, Subtelomeric 1p36 deletion.