Understanding Septo-Optic Dysplasia (SOD)
At a Glance
Septo-Optic Dysplasia (SOD) is a rare, non-progressive condition involving underdeveloped optic nerves, pituitary hormone deficiencies, and midline brain differences. While brain structure won't worsen over time, evolving hormone needs and development can be effectively managed with a medical team.
Receiving a diagnosis of Septo-Optic Dysplasia (SOD) can feel overwhelming, but it is important to remember that this diagnosis is a starting point, not a final destination. SOD is a rare condition that occurs during early brain development [1][2]. While the name may sound complex, understanding the basics of the condition can help you feel more empowered as you navigate your child’s care.
What is Septo-Optic Dysplasia?
Septo-Optic Dysplasia, also known as de Morsier syndrome, is a congenital (present at birth) condition involving the development of the brain’s midline structures [1][3]. Because it is a “spectrum disorder,” it affects every child differently [4][5]. Some children may have very mild symptoms, while others require more intensive medical support [6].
Doctors typically diagnose SOD when a child has at least two of the following three features, known as the classic triad. You can learn more about these in The Three Pillars: Symptoms and the SOD Triad:
- Optic Nerve Hypoplasia (ONH): The optic nerves (which carry visual information from the eyes to the brain) are smaller than usual, which can affect vision [1].
- Pituitary Hormone Abnormalities: The pituitary gland (the “master gland” at the base of the brain) may not produce enough of certain hormones, such as growth hormone or thyroid-stimulating hormone [7].
- Midline Brain Defects: Structural differences in the center of the brain, most commonly the absence of the septum pellucidum (a thin membrane in the middle of the brain) [2].
It is important to note that many children do not have all three features; in fact, only about 38% of patients present with the full triad [8].
Understanding the SOD Spectrum
The most important thing to know is that SOD is a non-progressive condition [9]. This means that the structural brain differences and the underdevelopment of the optic nerves are fixed—they will not get worse over time [10].
However, because the body grows and changes, your child’s medical needs may evolve. For example:
Managing Pituitary and Endocrine Health
Learn how to manage endocrine and pituitary health in Septo-Optic Dysplasia (SOD). Understand adrenal insufficiency, stress dosing, and hormone monitoring.
Vision, Brain Health, and Neurodevelopment
Learn how to support your child's vision and brain development in Septo-Optic Dysplasia. Understand CVI, seizure risks, and early intervention therapies.
Orienting Facts for Parents
While the diagnosis is a lot to process, these facts can help ground you as you move forward:
The Origins of Septo-Optic Dysplasia: Genetics and Beyond
Learn about the causes and genetics of Septo-Optic Dysplasia (SOD). Understand why most cases are sporadic, the role of genes, and what it means for you.
Building Your Child's Care Team
Learn how to build a specialized care team for your child's Septo-Optic Dysplasia (SOD). Discover which specialists you need and how to organize their records.
The Journey Ahead: Long-Term Outlook and Quality of Life
Discover the long-term outlook for children with Septo-Optic Dysplasia (SOD). Learn about managing vision, development, hormones, and quality of life.
By focusing on your child’s specific needs rather than the label of the diagnosis, you can provide them with the specialized care they need to thrive.
Common questions in this guide
What is the classic triad of Septo-Optic Dysplasia?
Will my child's Septo-Optic Dysplasia get worse over time?
Did I do something during pregnancy to cause my child's SOD?
How is Septo-Optic Dysplasia treated?
Which specialists should be on my child's SOD care team?
Questions for Your Doctor
5 questions
- •Based on the MRI results, which specific midline brain structures are affected in my child?
- •Has a full pituitary hormone panel been completed to screen for deficiencies like growth hormone or adrenal insufficiency?
- •What degree of optic nerve hypoplasia was found, and how might this affect my child's visual development?
- •How often will we need to repeat hormone testing as my child grows?
- •Which specialists (endocrinology, ophthalmology, neurology) should be part of my child's core care team?
Questions for You
4 questions
- •What symptoms or signs first led us to seek a medical evaluation (e.g., eye movements, growth concerns, low blood sugar)?
- •What are my child's current strengths and developmental milestones?
- •Do I have a clear system for tracking my child's appointments, test results, and specialist recommendations?
- •What are my biggest fears right now, and what information would help me feel more prepared to manage my child's care?
References
References (12)
- 1
Septo-optic dysplasia plus diagnosed in adulthood.
Infante-Valenzuela A, Camara-Lemarroy CR, Reyes-Mondragon AL, et al.
Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology 2017; (38(9)):1705-1707 doi:10.1007/s10072-017-2985-7.
PMID: 28474147 - 2
Prenatal diagnosis of isolated agenesis of the septum pellucidum with ultrasound and magnetic resonance imaging
Nemcsik-Bencze Z, Várbíró S, Rudas G, Nemcsik J
Orvosi hetilap 2020; (161(52)):2195-2200 doi:10.1556/650.2020.31912.
PMID: 33361505 - 3
Septo-optic dysplasia associated with chromosome 15q13.3 duplication: a case report.
Ham JA, Kim SH, Park D
Journal of Yeungnam medical science 2023; (40(4)):419-422 doi:10.12701/jyms.2022.00493.
PMID: 36458369 - 4
The clinical aspects of septo-optic dysplasia: A narrative review with illustrative case report.
Al-Salihi MM, Qassim T, Aji N, et al.
International journal of surgery case reports 2023; (109()):108575 doi:10.1016/j.ijscr.2023.108575.
PMID: 37524018 - 5
Clinical and Radiologic Spectrum of Septo-optic Dysplasia: Review of 17 Cases.
Alt C, Shevell MI, Poulin C, et al.
Journal of child neurology 2017; (32(9)):797-803 doi:10.1177/0883073817707300.
PMID: 28482731 - 6
Review of the MRI brain findings of septo-optic dysplasia.
Ward DJ, Connolly DJA, Griffiths PD
Clinical radiology 2021; (76(2)):160.e1-160.e14 doi:10.1016/j.crad.2020.09.007.
PMID: 33019967 - 7
Endocrine Dysfunction in Children with Zika-Related Microcephaly Who Were Born during the 2015 Epidemic in the State of Pernambuco, Brazil.
Veras Gonçalves A, Miranda-Filho DB, Rocha Vilela LC, et al.
Viruses 2020; (13(1)) doi:10.3390/v13010001.
PMID: 33374895 - 8
Clinical characteristics of septo-optic dysplasia accompanied by congenital central hypothyroidism in Japan.
Nagasaki K, Kubota T, Kobayashi H, et al.
Clinical pediatric endocrinology : case reports and clinical investigations : official journal of the Japanese Society for Pediatric Endocrinology 2017; (26(4)):207-213 doi:10.1297/cpe.26.207.
PMID: 29026269 - 9
Visual Acuity Outcomes in Children With Optic Nerve Hypoplasia and Septo-Optic-Pituitary Dysplasia.
Salman MS, Hossain S, Carson E, et al.
Pediatric neurology 2023; (149()):167-175 doi:10.1016/j.pediatrneurol.2023.09.018.
PMID: 38557645 - 10
Patients with septo-optic dysplasia: General ophthalmologic assessment and retinal imaging.
Eibenberger K, Rezar-Dreindl S, Briem J, et al.
European journal of ophthalmology 2023; (33(5)):NP11-NP20 doi:10.1177/11206721221128865.
PMID: 36163692 - 11
Recurrent Hypoglycaemia Leading to Early Diagnosis of Septo-Optic Dysplasia in a Small-for-Gestational-Age Infant-A Case Report.
Tan YRL, Dong X, Lek N, et al.
Clinical case reports 2026; (14(2)):e71985 doi:10.1002/ccr3.71985.
PMID: 41674888 - 12
The central diabetes insipidus associated with septo-optic dysplasia (de Morsier syndrome).
Hetman M, Fułek M, Zajączkowska K, et al.
Pediatric endocrinology, diabetes, and metabolism 2018; (24(4)):197-203 doi:10.5114/pedm.2018.83367.
PMID: 30963758
This page provides a general overview of Septo-Optic Dysplasia for educational purposes. Always consult your child's pediatric neurologist or endocrinologist for specific medical advice.
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