Potential for Linear Height Gain After Age 18
After epiphyseal (growth plate) fusion, longitudinal bone growth stops, so substantial height increase is not expected. [1] Height increase after age 18 is only possible when growth plates remain open or when a medical condition delays fusion and limits growth, allowing ongoing linear growth. [1]
Role of Growth Plate Closure
Linear growth depends on continuing growth plate activity. [1] Pubertal growth velocity decreases and growth stops after epiphyseal fusion. [1]
Conditions That Can Still Allow Growth in Late Adolescence/Early Adulthood
Endocrine disorders that impair growth can be treated to improve final height when growth is still ongoing. [2] Growth hormone deficiency is one such condition where treatment is used to achieve appropriate adult height. [2] In growth hormone deficiency, therapy is continued until adult height is reached and growth is no longer occurring. [2]
Clinical Evaluation for Height Gain Potential
Confirmation of growth potential requires assessment of skeletal maturity (bone age) and evidence of ongoing growth. [2] Ongoing growth is necessary for any treatment to increase height meaningfully. [1]
Non–Growth Plate Reasons for “Height Changes”
Apparent height increases after adolescence can occur from posture or musculoskeletal changes rather than true lengthening of long bones. [1] True increase in stature requires continuing longitudinal bone growth at the growth plates. [1]
Treatment Options With Documented Mechanisms
Management is directed at the underlying cause of impaired growth when growth plates are still capable of contributing to height. [2] Growth hormone therapy is used for growth hormone deficiency and is associated with reaching an expected adult height when growth is still ongoing. [2]
Common Misconceptions to Avoid
Claims of height increase after epiphyseal fusion do not match established biology of growth plate–dependent longitudinal growth. [1] Unnecessary growth-stimulating treatments without evidence of ongoing growth have no mechanism to create true linear height gain after fusion. [1]
Targets for Decision-Making
Decision-making focuses on whether growth plates are still active and whether growth velocity is still present. [1][2] When growth plates are fused and growth velocity is absent, substantial additional height gain is not expected. [1]