Fissure-in-ano
(fisher)
is a
condition
characterized
by a
longitudinal
crack or
slit
(ulcer)
in the
skin of
anus. If
the skin
lining
of the
lower
end of
the anus
gets
scratched,
it may
break up
into a
fissure.
Fissure-in-ano
is
observed
in
children
as well
as in
adults;
however,
it is
more
common
amongst
middle-aged
adults.
The
posterior
midline
of the
anus is
the most
common
location
for
fissure
due to
low
supply
of blood
in this
area.
Rarely,
it can
be
present
on the
other
areas,
such as
sides of
the anus
rather
than
posterior
midline
position.
Such
fissure
may be
the
manifestation
of
underlying
disease
e.g.
Crohn's
disease,
ulcerative
colitis
etc |
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