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Dwarfism
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Genetics Birth Defects

Dwarfism

Dwarfism is defined by an adult height under 4' 10" and can be caused by over 300 different genetic, metabolic, or hormonal conditions.

Overview

People with dwarfism have short stature. This means that their height is under 4' 10" as an adult. They are usually of normal intelligence. Dwarfism most often does happen in families where both parents are of average height.

Causes

More than 300 different conditions can cause dwarfism. Achondroplasia is the most common type of dwarfism. Achondroplasia is a genetic condition that affects about 1 in 15,000 to 1 in 40,000 people. It makes your arms and legs short in comparison to your head and trunk. You may also have a larger head and weak muscle tone. Other genetic conditions, kidney disease, and problems with metabolism or hormones can also cause dwarfism.

Management

The conditions that cause dwarfism can also cause other health problems. Most of them are treatable. It is important to have regular checkups throughout your life. With proper medical care, most people with dwarfism have active lives and live as long as other people.

Frequently Asked Questions

People with achondroplasia often face spinal stenosis, sleep apnea, and joint problems. Regular spinal imaging, sleep studies, and orthopedic evaluations every 1–2 years help detect and manage these issues early.
djustable furniture, ergonomic tools, and accessible building designs reduce physical strain. In the workplace, flexible seating, height‑adjustable desks, and assistive technology can improve productivity. Employers may also provide training on safe lifting techniques and ergonomic assessments.===
Growth hormone therapy stimulates bone growth in children with certain forms of dwarfism, such as pituitary hormone deficiency. Eligibility requires a confirmed diagnosis, a documented growth hormone deficiency, and a physician’s recommendation. Treatment is typically daily injections for several years, monitored by growth charts and hormone levels.
Diagnosis starts with a height measurement and a review of family history. Genetic testing, such as a DNA analysis for FGFR3 mutations, confirms achondroplasia. Other tests—bone age X‑rays, blood work for hormone levels, and metabolic panels—help identify alternative causes.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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