| Dupuytren's can affect any
digit, including the thumb. Reports vary regarding the incidence of
thumb involvement, from being the third most likely involved to the
least likely involved. The thumb is usually not involved in isolation;
other digits are likely to be affected as well, and thumb involvement
is associated with more aggressive Dupuytren's. There are four common
zones of thumb involvement: first web; proximal first web; central
thenar; proximal thenar. Proximal thenar involvement is usually in
continuity with a radial lateral digital cord of the thumb. These
pictures demonstrate the similarity and variability of radial thumb and
proximal thenar Dupuytren's.
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