Dwarfism: Causes, Types & Health Considerations

Dwarfism is a condition of short stature (adult height ≤4'10" / 147 cm) resulting from a medical or genetic condition. It is not a disease itself but a phenotypic outcome.

Major Categories

• Disproportionate dwarfism: Limbs disproportionate to trunk.
  • Achondroplasia (FGFR3 mutation) — most common (70%); rhizomelic shortening, macrocephaly, lumbar lordosis.
  • Hypochondroplasia, pseudoachondroplasia, diastrophic dysplasia, spondyloepiphyseal dysplasia.
• Proportionate dwarfism: Trunk and limbs proportionally small.
  • Growth hormone deficiency (GHD), IGF-1 deficiency.
  • Primordial dwarfism (genetic: PCNT, ORC1, etc.).
  • Turner syndrome, Noonan syndrome, Russell-Silver syndrome.
  • Chronic malnutrition, malabsorption, renal/hepatic disease, glucocorticoid excess.

Associated Health Issues

• Skeletal: Spinal stenosis, kyphosis, joint arthritis, bowing.
• Neurologic: Foramen magnum stenosis (achondroplasia), hydrocephalus.
• Respiratory: Restrictive lung disease, sleep apnea.
• Cardiac: Valvular anomalies, cardiomyopathy (some syndromes).
• ENT: Recurrent otitis, hearing loss.
• Dental: Crowding, malocclusion.

Management

• Multidisciplinary: genetics, orthopedics, neurosurgery, pulmonology, ENT, PT/OT.
• Growth hormone for GHD, some syndromic forms.
• Surgical decompression for spinal stenosis.
• Adaptive equipment, accessibility, psychosocial support.

People with dwarfism lead full lives. Respectful language: "person with dwarfism," "short stature," "little person" (preferred by many). Avoid "midget" (slur).