Term Name:	preaxial polydactyly II
Synonyms:	polydactyly of a triphalangeal thumb
Definition:	A polydactyly characterized by the presence of 3 phalanges within the thumb that has_material_basis_in heterozygous mutation in the ZRS, a regulatory element of SHH, on chromosome 7q36.
Ontology:	Human Disease [DOID:0060986]   ( DOID:0060986 )