MONDO_0010655 (X-linked intellectual disability with marfanoid habitus) is the Lujan-Fryns syndrome or X-linked mental retardation (XLMR) with marfanoid habitus syndrome is a syndromic X-linked form of intellectual disability, associated with tall, marfanoid stature, distinct facial dysmorphism and behavioral problems. Also known as: Lujan syndrome, Lujan-Fryns syndrome, Lujan-Fryns syndrome, X-linked recessive.