Likely epigenetic: This is unlikely to be due to genetic influences since you two are genetically identical. Possibilities causing the deformity include amniotic band syndrome or deformity due to fetal crowding. See an orthopaedic foot and ankle surgeon in your area for diagnosis and treatment: www.Aofas.Org.
Answered 10/3/2016
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7 doctors weighed in across 3 answers
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