title: Left hand polydactyly: a case report.
abstract: BACKGROUND
  Polydactyly is a congenital anomaly with a wide range of manifestations that occurs in many forms, ranging from varying degrees of mere splitting to completely duplicated thumb. When duplication occurs alone, it is usually unilateral and sporadic.
  
  
  METHODS
  In this case report we describe an otherwise healthy 19-year-old woman of Tibetan heritage with isolated left hand preaxial polydactyly. She experienced working related difficulties in her daily yak's milking. She subsequently underwent surgical correction, and the over number thumb was removed with associated meticulous skeletal and soft tissue reconstruction.
  
  
  CONCLUSIONS
  Polydactyly is the most common congenital digital anomaly of the hand and foot. It can occur in isolation or as part of a syndrome. Surgery is necessary to create a single, functioning thumb and is indicated to improve cosmesis. Skin, nail, bone, ligament, and musculoskeletal elements must be combined to reconstruct an optimal digit. In this case (Tibetan society is almost exclusively a sheep-breeding one) surgery was necessary to leave a single, functioning thumb for her work as yak milkmaid.
authors.affiliation: Section of Emergency Medicine, Department of Internal Medicine, Ospedale Civile Livorno, 57100 Livorno, Italy. nimumoli@tiscali.it.
authors.forename: Nicola
authors.initials: N
authors.lastname: Mumoli
authors.forename: Daniele
authors.initials: D
authors.lastname: Gandini
authors.forename: Edris Kalanzi
authors.initials: EK
authors.lastname: Wamala
authors.forename: Marco
authors.initials: M
authors.lastname: Cei