Acropectoral Syndrome Watchlist (log in to enable) Retrieved 2021-01-23 Source Orphanet Trials — Genes — Drugs — Interested in hearing about new therapies? Registered! A rare syndrome characterized by a combination of distal limb abnormalities (syndactyly of all fingers and toes, preaxial polydactyly in the feet and/or hands) and upper sternum malformations.