Arachnodactyly

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Arachnodactyly Classification and external resources
ICD-10	Q87.4
ICD-9	759.82
DiseasesDB	15196
MeSH	D008382

Arachnodactyly, also known as "spider fingers" or achromachia, is a condition in which the fingers are abnormally long and slender in comparison to the palm of the hand. It can be present at birth or develop in later life.

This feature can occur on its own, with no underlying health problems. However, it can also be associated with certain medical conditions. Examples include Marfan syndrome and homocystinuria.

Arachnodactyly has been linked to mutations in the fibrillin-2 gene.

It is also seen in some cases that all or a few fingers can be bent backwards of 180 degrees.

v • d • e Congenital malformations and deformations of musculoskeletal system / musculoskeletal abnormality (Q65-Q76, 754-756) Limb/ dysmelia Upper Cleidocranial dysostosis - Madelung's deformity - Sprengel's deformity - Wallis Zieff Goldblatt syndrome - Clinodactyly Lower hip: Dislocation of hip/Hip dysplasia - Upington disease - Coxa valga - Coxa vara knee: Genu valgum - Genu varum feet: Club foot - Flat feet - Pes cavus Either/both dactyly: Polydactyly/Syndactyly (Webbed toes) - Arachnodactyly - Cenani Lenz syndactylism reduction deficits: Acheiropodia - Amelia - Ectrodactyly - Phocomelia - Brachydactyly multiple joints: Arthrogryposis - Larsen syndrome - Rapadilino syndrome Craniofacial 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 Other axial spine: spinal curvature (Scoliosis) - Klippel-Feil syndrome - Spondylolisthesis ribs: Cervical rib - Bifid rib sternum: Pectus excavatum - Pectus carinatum Abdominal wall Congenital diaphragmatic hernia - Omphalocele - Gastroschisis - Prune belly syndrome see also non-congenital, neoplasia