What is this?
A sandal gap deformity or hallux varus creates an expanded first interspace between the hallux and the rest of the toes. It is a likened to the gap caused by wearing a sandal but is actually a normal variant. It can occasionally be developmental. In the fetus, it can be a soft marker for other fetal anomalies such as Downs syndrome, an amniotic band or ectrodactyly. It’s considered benign, however in this individual could have been developmental.
Notice how he has external tibial torsion (when his knees are pointing forward his feet point to the outside). External tibial torsion generally, because of the orientation of the foot, causes the center of gravity to fall medially thus the need for something to push and stabilize you more laterally, such as toes two through five abducting : )
Dr Ivo Waerlop, one of The Gait Guys
#halluxvarus #strangelookingfeet #hallux #thegaitguys #sandalgapdeformity
Barp EA, Temple EW, Hall JL, Smith HL. Treatment of Hallux Varus After Traumatic Adductor Hallucis Tendon Rupture. J Foot Ankle Surg. 2018 Mar - Apr;57(2):418-420.
Munir U, Morgan S. Hallux Varus. StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2019 Jan-.
2019 May 6.
Ryan PM, Johnston A, Gun BK. Post-traumatic dynamic hallux varus instability. J Clin Orthop Trauma. 2014 Jun;5(2):94-8. doi: 10.1016/j.jcot.2014.05.005. Epub 2014 Jun 15.