What term is used for the condition where two or more fingers or toes are webbed or fused together?

The term used for the condition where two or more fingers or toes are webbed or fused together is syndactyly. This congenital condition involves the soft tissue or bones of the digits being joined, which can vary in severity, from a simple skin connection to complete fusion involving bone. Syndactyly is often noticed at birth and can occur isolated or as part of syndromic conditions.

In contrast, polydactyly refers to a condition where a person has extra fingers or toes. Amniotic band syndrome involves the entrapment of fetal parts by amniotic bands, which can lead to various limb deformities but does not specifically involve webbing. Phocomelia is a severe limb reduction defect that affects the development of the arms and legs, not fusion or webbing of digits. Understanding these distinctions is crucial for accurately identifying and addressing congenital conditions in neonates.