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Hanhart syndrome
Hanhart
syndrome
is a
congenital disorder
that
causes
an
undeveloped
tongue
and malformed
extremities
and
fingers
.
Notable
cases
Nick Santonastasso
,
actor
,
Instagram
star
, and
YouTube prankster
, who has no
legs
and only one
arm
.
Noted
for
playing
zombies
.