A
true
cyst
is
an
enclosed
space
usually
____________________
fluid
and
lined
by
epithelium
.
A
pseudocyst
is
a
cystlike
structure
____________________
epithelial
lining
.
Cysts
may
be
____________________
on
the
basis
of
their
pathogenesis
and
histologic
features
.
The
primary
categories
____________________
appendageal
and
adnexal
cysts
,
developmental
cysts
,
pseudocysts
,
and
neoplasms
with
cystic
changes
.
The
most
common
lining
____________________
stratified
squamous
epithelium
,
which
is
observed
in
the
____________________
common
appendageal
____________________
,
such
as
the
epidermoid
(
infundibular
)
and
pilar
(
isthmic
catagen
,
trichilemmal
)
cysts
.
Some
developmental
cysts
have
a
lining
of
columnar
____________________
and
are
classified
as
cutaneous
columnar
cysts
;
____________________
cysts
include
branchial
,
thyroglossal
,
thymic
,
bronchogenic
,
cutaneous
ciliated
,
____________________
median
raphe
cysts
.
The
term
ciliated
cyst
has
____________________
used
for
several
unrelated
entities
with
a
____________________
epithelial
lining
;
these
unrelated
entities
represent
aberrant
embryologic
____________________
because
no
typical
cutaneous
structures
contain
cilia
.
