What are underlapping toes?
Underlapping toes are commonly seen in the adult and paediatric population. The toes most often involved are the fourth and fifth toes. The exact cause of the deformity is unclear.
A possible aetiology is an imbalance in muscle strength of the small muscles of the foot.
This is aggravated by a subtle abnormality in the orientation on the joints in the foot just below the ankle joint called the subtalar joint.