Polydactyly is the most common hereditary limb anomaly characterized by extra fingers. Preaxial polydactyly (PPD) refers to polydactyly where the additional digit grows toward the first digit of the hand or foot. Mutations in genes including GLI1, GLI3 and SHH/ZRS, involved in Hedgehog pathway, result in PPD.
Category
Congenital malformation
Brite
Human diseases in ICD-11 classification [BR:br08403]
20 Developmental anomalies
Structural developmental anomalies primarily affecting one body system
Structural developmental anomalies of the skeleton
LB78 Polydactyly
H02332 Preaxial polydactyly
Pathway-based classification of diseases [BR:br08402]
Signal transduction
nt06501 HH signaling
H02332 Preaxial polydactyly
Radhakrishna U, Bornholdt D, Scott HS, Patel UC, Rossier C, Engel H, Bottani A, Chandal D, Blouin JL, Solanki JV, Grzeschik KH, Antonarakis SE
Title
The phenotypic spectrum of GLI3 morphopathies includes autosomal dominant preaxial polydactyly type-IV and postaxial polydactyly type-A/B; No phenotype prediction from the position of GLI3 mutations.
