Handbook of Genetic Counseling/Achondroplasia-2


Confirm diagnosis Edit

  • Physical features
    • disproportionate short stature, shortening of the proximal segment of the limbs, prominent forehead, shallow nasal bridge, flattened midface,

average size trunk, large head relative to the body size

  • Radiographs
    • contracted base of the skull, square pelvis shape with a small sacrosciatic notch, short pedicles of the vertebrae, rhizomelic (proximal) shortening of the long bones, trident hands, normal length trunk, proximal femoral radiolucency, chevron shape of the distal femoral epiphysis

Medical evaluation Edit

  • Measurements, proportions, and special growth charts
    • height arm span and lower segment
  • weight
    • control eating habits to avoid obesity
  • head circumference
  • Infantile issues
    • airway obstruction
    • sleep apnea
  • hydrocephalus
    • MRI to determine ventricular size
  • upper cord compression
    • MRI of the foramen magnum

Orthopedic Edit

  • thoracolumbar kyphosis/lumbar lordosis
    • truncal weakness
  • bowing of the legs
    • fibular overgrowth at the knees and ankles
  • hip flexion contractures
  • lumbosacral spinal stenosis
  • orthodontics/crowded teeth

Neurological Edit

  • normal intelligence
  • delayed motor milestones
  • equal deep tendon reflexes

Hearing Edit

  • otitis media
    • conductive hearing loss
  • speech evaluation

Psychosocial assessment Edit

  • Family support
    • family and friends' reactions
    • support groups
  • anticipatory guidance/learning from other families

Long-term planning Edit

  • behavior and development
    • avoid gymnastics and contact sports
  • socialization skills
  • adaptation of the home

occupational therapy consultation Edit

  • schooling
  • SSI benefits

Clinical treatments Edit

  • Growth hormone studies
  • Limb-lengthening procedures

Notes Edit

The information in this outline was last updated in 2002.