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Thenar Dysplasia in Radial Polydactyly Depends on the Level of Bifurcation.

Abstract Little is known about thenar dysplasia in radial polydactyly, other than that thenar hypoplasia occasionally occurs in radial polydactyly with triphalangism. In particular, the phenotype and level of duplication associated with thenar dysplasia remain unclear.
PMID
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Authors

Mayor MeshTerms

Phenotype

Keywords
Journal Title plastic and reconstructive surgery
Publication Year Start




PMID- 29280874
OWN - NLM
STAT- MEDLINE
DCOM- 20180112
LR  - 20180112
IS  - 1529-4242 (Electronic)
IS  - 0032-1052 (Linking)
VI  - 141
IP  - 1
DP  - 2018 Jan
TI  - Thenar Dysplasia in Radial Polydactyly Depends on the Level of Bifurcation.
PG  - 85e-90e
LID - 10.1097/PRS.0000000000003937 [doi]
AB  - BACKGROUND: Little is known about thenar dysplasia in radial polydactyly, other
      than that thenar hypoplasia occasionally occurs in radial polydactyly with
      triphalangism. In particular, the phenotype and level of duplication associated
      with thenar dysplasia remain unclear. METHODS: The abductor pollicis brevis and
      flexor pollicis brevis muscles were visualized using three-dimensional
      ultrasound, and their horizontal geometry was assessed using a biaxial level
      classification system. Subjects were categorized into three phenotypes according 
      to the developmental condition of the radial thumb. The relationship between the 
      level of distribution of the muscles and the level of the bifurcation of the
      radial thumb was investigated. RESULTS: Nineteen patients with radial polydactyly
      without triphalangism were included. There were 10 patients with the nonfloating 
      type, three with the floating type, and six with the rudimentary type. All
      patients with bifurcation at or more distal to the metacarpophalangeal joint had 
      normal thenar muscle distribution, but the muscles in patients with bifurcation
      at or more proximal to the level of the metacarpals were confined, regardless of 
      phenotype. The level of muscle distribution was strongly correlated with the
      level of the bifurcation of the radial thumb. CONCLUSIONS: These findings suggest
      that formation of the thenar muscles in the longitudinal direction in radial
      polydactyly might depend on the level of bifurcation of the radial thumb. The
      presence of thenar dysplasia even in floating-type or rudimentary-type
      duplications is of clinical and etiologic importance.
FAU - Saito, Susumu
AU  - Saito S
AD  - Kyoto, Japan From the Department of Plastic and Reconstructive Surgery, Graduate 
      School of Medicine and Faculty of Medicine, Kyoto University.
FAU - Ueda, Maho
AU  - Ueda M
FAU - Murata, Mai
AU  - Murata M
FAU - Suzuki, Shigehiko
AU  - Suzuki S
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Plast Reconstr Surg
JT  - Plastic and reconstructive surgery
JID - 1306050
SB  - AIM
SB  - IM
MH  - Adolescent
MH  - Child
MH  - Child, Preschool
MH  - Fingers/*abnormalities/diagnostic imaging
MH  - Humans
MH  - Infant
MH  - Muscle, Skeletal/*abnormalities/diagnostic imaging
MH  - *Phenotype
MH  - Polydactyly/*diagnostic imaging/pathology
MH  - Thumb/abnormalities/diagnostic imaging
MH  - Ultrasonography
EDAT- 2017/12/28 06:00
MHDA- 2018/01/13 06:00
CRDT- 2017/12/28 06:00
PHST- 2017/12/28 06:00 [entrez]
PHST- 2017/12/28 06:00 [pubmed]
PHST- 2018/01/13 06:00 [medline]
AID - 10.1097/PRS.0000000000003937 [doi]
AID - 00006534-201801000-00028 [pii]
PST - ppublish
SO  - Plast Reconstr Surg. 2018 Jan;141(1):85e-90e. doi: 10.1097/PRS.0000000000003937.