Zusammenfassung
Das Vorhandensein von drei Phalangen am radialen ersten Handstrahl gilt als relativ
seltene Malformation der Hand. Dabei werden sechs Typen von Triphalangismen unterschieden,
wobei einige opponierbar sind, andere einer nicht opponierbaren „Fünf-Finger-Hand“
ähneln. Bei hypoplastischem Thenar und eingeschränkter Opposition war bis jetzt der
Nachweis einer für den ersten Strahl spezifischen Muskulatur in vivo kaum durchführbar. Wir berichten über die Möglichkeit eines klaren, nicht-invasiven
Nachweises daumenspezifischer Muskulatur mittels MRT.
Abstract
The presence of three phalanges in the first digit is considered to be a relatively
rare congenital hand malformation. Six groups of this deformity can be distinguished:
some digits are opposable, others resemble a non-opposable five-fingered hand. In
cases of a hypoplastic thenar region with a restrained opposition, a clear verification
of thumb-specific musculature has been hardly possible. We report of the possibility
of a non-invasive identification of thumb-specific muscles by means of magnetic resonance
imaging.
Schlüsselwörter
Angeborene Handfehlbildung - triphalangealer Daumen - Thenarmuskulatur - MRT
Key words
Triphalangeal thumb - congenital hand malformation - MRI - thenar-specific muscles
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Dr. med. Konstantina Belouli
Departement Chirurgie Klinik für Wiederherstellungschirurgie Universitätsspital Zürich
8091 Zürich
Schweiz
Email: konstantina.belouli@usz.ch