Wassel classification

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

Classification

Type	Level of duplication
I	Distal phalanx
II	Interphalangeal joint
III	Proximal phalanx
IV	Metacarpophalangeal joint
V	Metacarpal
VI	Carpometacarpal joint
VII	Triphalangia

References

^ "Orthobullets". Retrieved 27 October 2014.

Congenital malformations and deformations of musculoskeletal system / musculoskeletal abnormality

Appendicular
limb / dysmelia

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

hip	Hip dislocation / 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 Stub 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 Oto-palato-digital syndrome Treacher Collins syndrome
other	Macrocephaly Platybasia Craniodiaphyseal dysplasia Dolichocephaly Greig cephalopolysyndactyly syndrome Plagiocephaly Saddle nose

Vertebral column

Thoracic skeleton

ribs:	Cervical Bifid
sternum:	Pectus excavatum Pectus carinatum
other:	Poland syndrome

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