Congenital transverse deficiencies: bilateral presentation of the foot.

Congenital transverse deficiency is a rare structural anomaly, primarily occurring in utero. Even though it is rare, congenital transverse deficiency is seen in the private practice setting, and many physicians may be unprepared to make the diagnosis or offer treatment. Furthermore, congenital transverse deficiencies, particularly of the lower extremity, are given little attention in literature. This article briefly highlights congenital transverse deficiencies and discusses the differences and similarities between true Ainhum and congenital transverse deficiency. It provides a case presentation in the hope of helping readers understand, identify, and treat patients who have such afflictions.