Standard of Care: Endocrine Management, Therapies & Screening

Managing 18p deletion syndrome requires a proactive, “whole-child” approach. Because the condition affects multiple systems, your child will benefit from a team of specialists working together to monitor their growth, development, and long-term health ^[1][2].

Endocrine Management and Growth

One of the most critical areas of care for children with 18p- is the endocrine system, specifically the pituitary gland.

• Growth Hormone (GH) Deficiency: Isolated Growth Hormone Deficiency is the most common endocrine issue in 18p- and is a leading cause of short stature ^[3].
• GH Therapy: Treatment with recombinant human growth hormone is highly effective and is considered a standard intervention. It has been shown to significantly improve linear growth (height) and can support healthy metabolism ^[3].
• Panhypopituitarism: In much rarer cases, the pituitary gland may fail to produce multiple hormones (a condition called panhypopituitarism) ^[3]. Because of this slight risk, your doctor should also periodically check thyroid and adrenal function ^[3][1].

Essential Structural Screenings

Certain screenings are recommended to check for structural differences:

• Brain MRI: This imaging is used to check for holoprosencephaly (HPE), a condition where the brain doesn’t divide correctly into two hemispheres ^[4]. Severe forms of HPE are usually obvious at birth or on prenatal ultrasounds. However, an MRI may be ordered for a newly diagnosed infant or child to definitively rule out milder forms of HPE ^[4].
• Cardiac Evaluation: Children with 18p- have an increased risk for structural congenital heart defects (such as atrial or ventricular septal defects), and occasionally cardiac hypertrophy ^[5]. A baseline echocardiogram (heart ultrasound) is highly recommended to ensure the heart is structurally sound and functioning normally ^[5].

Immune and Autoimmune Vigilance

Children with 18p- require monitoring for both immune system deficiencies and overactive immune responses (autoimmunity) ^[6][7].

• Immunodeficiency: Some individuals with chromosome 18 deletions experience IgA deficiency, meaning they lack a specific antibody that fights off infections ^[7]. Your doctor should check baseline immunoglobulin levels (specifically IgA). If deficient, you will need to monitor your child closely for recurrent respiratory or ear infections.
• Autoimmune Conditions: Recent research has linked the loss of the PTPRM gene to an increased risk of autoimmune conditions, where the body attacks its own tissues ^[6]. There are documented cases of Type 1 Diabetes and autoimmune thyroid issues (like Graves’ or Hashimoto’s) in 18p- patients ^[8].

The Power of Early Intervention

Because speech delays and motor challenges are nearly universal, starting therapies as early as possible is the “gold standard” for care ^[1].

• Speech Therapy: Focuses on both communication and feeding/swallowing, which is especially important for infants with hypotonia.
• Physical Therapy (PT): Helps with low muscle tone and reaching motor milestones like crawling or walking ^[2].
• Occupational Therapy (OT): Assists with fine motor skills, sensory processing, and daily activities.

Standard of Care Checklist

Use this list to track your child’s health screenings:

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