Wassel classification

The Wassel classification is used to categorise radial polydactyly, based upon the most proximal level of skeletal duplication.^[1]

Classification

clavicle / shoulder:	Cleidocranial dysostosis Sprengel's deformity Wallis–Zieff–Goldblatt syndrome
hand deformity:	Madelung's deformity Clinodactyly Oligodactyly Polydactyly

hip:	Dislocation of hip / Hip dysplasia Upington disease Coxa valga Coxa vara
knee:	Genu valgum Genu varum Genu recurvatum Discoid meniscus Congenital patellar dislocation Congenital knee dislocation
foot deformity:	varus Club foot Pigeon toe valgus Flat feet Pes cavus Rocker bottom foot Hammer toe

Either / both

fingers and toes	Polydactyly / Syndactyly webbed toes Arachnodactyly Cenani–Lenz syndactylism Ectrodactyly Brachydactyly Clubbed thumb
reduction deficits / limb:	Acheiropodia ectromelia Phocomelia Amelia Hemimelia
multiple joints:	Arthrogryposis Larsen syndrome Rapadilino syndrome

Craniosynostosis:	Scaphocephaly Oxycephaly Trigonocephaly
Craniofacial dysostosis:	Crouzon syndrome Hypertelorism Hallermann–Streiff syndrome Treacher Collins syndrome
other:	Macrocephaly Platybasia Craniodiaphyseal dysplasia Dolichocephaly Greig cephalopolysyndactyly syndrome Plagiocephaly Saddle nose

ribs:	Cervical Bifid
sternum:	Pectus excavatum Pectus carinatum

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