Incidence of Polydactyly and Triphalangism of Thumb.

Lee, Jeong Min; Kim, Sun Goo; Hwang, Kun; Kim, Yu Jin; Lee, Se IL; Jung, Sung Gyun; Jun, Young Joon

Original Article

Journal of the Korean Society of Plastic and Reconstructive Surgeons 2009;36(4):458-461.
Published online July 1, 2009.

Incidence of Polydactyly and Triphalangism of Thumb.

Jeong Min Lee, Sun Goo Kim, Kun Hwang, Yu Jin Kim, Se IL Lee, Sung Gyun Jung, Young Joon Jun

¹Department of Plastic Surgery, Gachon University of Medical and Science, Gil Hospital, Incheon, Korea. pseugene@gilhospital.com
²Department of Plastic Surgery and Center for Advanced Medical Education by BK21 Project, Inha University, College of Medicine, Incheon, Korea.
³Department of Plastic and Reconstructive Surgery, Soonchunhyang University College of Medicine, Gyeonggi-do, Korea.
⁴Department of Plastic Surgery, College of Medicine, The Catholic University of Korea, Gyeonggi-do, Korea.

Abstract

PURPOSE
Preaxial polydactyly is the most common congenital anomaly of upper extremities. In this study, we classified 112 patients of preaxial polydactyly for investigation of recent incidences of each types. METHODS: We reviewed 120 cases of preaxial polydactyly diagnosed at university hospitals of Incheon and Bucheon from 2000 to 2008. All cases were grouped using simple radiographs and all cases were classified according to the Upton modified Iowa system.
RESULTS
Among the 120 cases of preaxial polydactyly, 7 cases(6%) were in type I polydactyly, 35 cases(29%) type II, 1 case(1%) type III, 48 cases(40%) type IV, 12 cases(10%) type V, 5 cases(4%) type VI, 12 cases(10%) type VII, respectively. All cases in type VII polydactyly were triphalangism.
CONCLUSION
Comparing with Wassel's study and Upton's study, our study showed similar distribution of each types of preaxial polydactyly.

Keywords: Polydactyly