Clubbed thumb

Brachydactyly type D
Top view of a child with asymmetric brachydactyly type D thumb.
Classification and external resources

Side view of a child with asymmetric BDD

"Clubbed thumb" is a misnomer for stub(by) thumb, known clinically as brachydactyly type D, or BDD.^[1] BDD is a harmless genetic trait characterized by the last bone of one or both thumbs being short and round with an accompanying short and wide nail bed.

Digital clubbing,^[2] however, is a "clinical sign associated with a number of diseases."^[3]

Other names

The condition is also sometimes known as potter's thumb or royal thumb but mostly referred to as a stubby thumb.^[1]

References

1 2 Online Mendelian Inheritance in Man (OMIM) Brachydactyly, Type D; BDD. -113200
↑ "National Center for Biotechnology Information". www.ncbi.nlm.nih.gov. Retrieved 2015-09-18.
↑ "Digital Clubbing: A Sign of Underlying Disease" (PDF). Hospital Physician.

Congenital malformations and deformations of musculoskeletal system / musculoskeletal abnormality (Q65–Q76, 754–756.3)

Appendicular
limb / dysmelia

Arms

clavicle / shoulder:	Cleidocranial dysostosis Sprengel's deformity Wallis–Zieff–Goldblatt syndrome

hand deformity:	Madelung's deformity Clinodactyly Oligodactyly Polydactyly

Leg

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

Axial

Skull and face

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

Vertebral column

Thoracic skeleton

ribs:	Cervical Bifid

sternum:	Pectus excavatum Pectus carinatum

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