Stump overgrowth in juvenile amputees

Area of Science:

• Orthopedics
• Pediatric Surgery
• Histopathology

Background:

• Skeletally immature patients undergoing amputation are susceptible to stump overgrowth, necessitating surgical revision.
• Congenital and acquired amputations present different challenges regarding residual limb development.
• Understanding factors influencing stump overgrowth is crucial for optimizing surgical outcomes in pediatric amputees.

Observation:

• Stump overgrowth requiring surgical revision occurred in 5.7% of 1,015 pediatric amputees.
• Acquired below-knee amputations had the highest revision rate (18.5%), while congenital amputations without conversion had the lowest (1.7%).
• Amputations performed after age 12 or disarticulations showed no overgrowth requiring revision.

Findings:

• Younger patient age correlated with a higher incidence of repeated surgical revisions for stump overgrowth.
• Histological examination of eight juvenile amputees revealed two primary patterns: reactive connective tissue stratification and bursa formation.
• The incidence of stump overgrowth requiring revision was significantly lower in patients who underwent disarticulation or amputation after skeletal maturity.

Implications:

• Age at amputation and surgical level (trans-tibial vs. disarticulation) are critical factors in predicting stump overgrowth.
• Histological findings suggest specific tissue responses that may contribute to overgrowth.
• Further research into the mechanisms of stump overgrowth and preventative strategies is warranted to improve long-term outcomes for pediatric amputees.