Related Experiment Video
Updated: May 5, 2026

07:41
An Intramedullary Locking Nail for Standardized Fixation of Femur Osteotomies to Analyze Normal and Defective Bone Healing in Mice
Published on: November 13, 2016
13.4K
Novel Insights Malalignment or Retronychia: Which Comes First?
André Lencastre1, Bertrand Richert2
1Department of Dermatology, Hospital de Cascais and Hospital da Luz, Lisboa, Portugal.
Skin Appendage Disorders
|February 6, 2025
Summary
Chronic retronychia in children may resemble congenital nail malalignment due to microtrauma. This case highlights the link between retronychia and acquired great toenail malalignment in a pediatric patient.
Area of Science:
- Podiatry
- Dermatology
- Pediatric Orthopedics
Background:
- Chronic retronychia and congenital great toenail malalignment share clinical similarities.
- Both conditions involve altered nail growth patterns potentially linked to microtrauma.
Purpose of the Study:
- To investigate the relationship between chronic retronychia and acquired great toenail malalignment.
- To present a pediatric case of chronic retronychia potentially caused by distal phalanx deviation.
Main Methods:
- Clinical case presentation of a 2-year-old girl with left great toenail changes.
- Assessment of nail growth abnormalities and potential contributing factors like distal phalanx alignment.
Main Results:
- The patient presented with chronic retronychia, suspected to be caused by lateral deviation of the distal phalanx.
- Conservative management was recommended, but early signs of retronychia complications were observed.
Conclusions:
- This case suggests a potential link between chronic retronychia and acquired great toenail malalignment.
- The findings underscore the importance of considering microtrauma and underlying structural issues in pediatric nail disorders.

