A soft tissue continuity in the anteroposterior axis between the second to the third fingers that extends distally to at least the level of the proximal interphalangeal joints. The phenotype is HP_0001233 (2-3 finger cutaneous syndactyly). Also known as: Syndactyly 2nd-3rd fingers, Syndactyly, 2-3 finger, Webbed 2nd-3rd fingers.