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Syndrome reference sheet
Generated 13 Oct 2026
Endocrinology · Endocrinology / Pediatric endocrinology

Septo-optic dysplasia

Also known as: De Morsier syndrome

Optic nerve hypoplasia with midline brain defects and hypopituitarism.

Medical specialty
Endocrinology
Subspecialty
Endocrinology / Pediatric endocrinology
Sex & age distribution
Male: affected; Female: affected equally; Children: yes, infancy
Gene(s) involved
HESX1, OTX2, PAX6, SOX2, SOX3

Etiology & mechanism

Early forebrain developmental defects.

Gene(s) involved (5)

HESX1OTX2PAX6SOX2SOX3

Symptoms & signs (8)

absent septum pellucidumgrowth hormone deficiencyhypoglycemiahypothyroidismneonatal jaundicenystagmusoptic nerve hypoplasiapoor vision
SyndromeScope — educational reference. Content is model-generated and not clinically verified; always confirm against OMIM, Orphanet and GeneReviews before clinical use.