An
anorectal
abscess
originates
from
an
infection
arising
____________________
the
cryptoglandular
epithelium
lining
the
anal
canal
.
____________________
internal
anal
sphincter
is
believed
to
serve
normally
____________________
a
barrier
to
infection
passing
from
the
gut
____________________
to
the
deep
perirectal
tissues
.
This
barrier
can
____________________
breached
through
the
crypts
of
Morgagni
,
which
can
____________________
through
the
internal
sphincter
into
the
intersphincteric
space
.
Once
infection
gains
access
to
the
intersphincteric
space
,
____________________
has
easy
access
to
the
adjacent
perirectal
____________________
.
____________________
of
the
infection
can
involve
the
intersphincteric
space
,
____________________
space
,
or
even
the
supralevator
space
.
In
some
____________________
,
the
abscess
remains
contained
within
the
intersphincteric
space
.
The
____________________
and
depth
of
the
____________________
are
quite
variable
,
and
the
abscess
cavity
is
often
associated
with
formation
____________________
a
fistulous
tract
.
For
that
reason
,
fistulas
are
also
discussed
in
this
article
where
relevant
.
