RGD uses the Human Disease Ontology (DO, https://disease-ontology.org/) for disease curation across species. RGD automatically downloads each new release of the ontology on a monthly basis. Some additional terms which are required for RGD's curation purposes but are not currently covered in the official version of DO have been added. As corresponding terms are added to DO, these custom terms are retired and the DO terms substituted in existing annotations and subsequently used for curation.
A rare, genetic, non-syndromic, congenital limb malformation disorder characterized by unilateral fusion of second to fifth fingers, amalgamation of distal phalanges in a knot-like structure, and second- and third-toe fusion. Some individuals present only with webbing between second and third toes, without involvement of fingers. (ORPHA)
Synonyms:
exact_synonym:
Mitten hand; Syndactyly, mitten type; Unilateral syndactyly of digits 2-5