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Syndrome reference sheet
Generated 12 Oct 2026
Genetics · Genetics / Single-gene syndromes

Lujan–Fryns syndrome

Also known as: Lujan syndrome

X-linked intellectual disability with marfanoid habitus.

Medical specialty
Genetics
Subspecialty
Genetics / Single-gene syndromes
Sex & age distribution
Male: affected, X-linked; Female: carriers; Children: yes
Gene(s) involved
MED12

Etiology & mechanism

MED12 mutation.

Gene(s) involved (1)

MED12

Symptoms & signs (6)

behavioral problemshypernasal speechintellectual disabilitylong facemacrocephalymarfanoid habitus
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