Several techniques exist for epiphysiodesis in limb length discrepancy with different results. Most of the time the results are disappointing for this functional surgery.

The aim of this study is understanding the reasons of the failures by analyzing the different steps of the medical care.

The patients will be distributed in two groups : "fulfilled contract" and "failed contract" The differences between the two groups will be analyzed.

Inclusion Criteria:

• Patients with limb length discrepancy who had epiphysiodesis surgery

Exclusion Criteria:

• Missing x-rays
• missing data
• bone growth not achieved

All minors with limb length discrepancy who had epiphysiodesis surgery