Cylindromas
are
benign
skin
appendage
tumors
.
They
can
____________________
seen
in
conjunction
with
spiradenomas
and
trichoepitheliomas
.
Cases
____________________
spiradenocylindromas
,
demonstrating
characteristics
of
both
spiradenoma
and
cylindroma
in
the
same
____________________
mass
,
have
also
been
observed
,
suggesting
similar
derivation
of
____________________
tumors
.
They
most
commonly
occur
on
the
head
and
neck
as
solitary
or
multiple
tumors
.
____________________
cylindromas
occur
sporadically
and
typically
are
not
____________________
.
Multiple
tumors
are
observed
in
an
autosomal
dominantly
inherited
manner
.
When
nodules
enlarge
and
____________________
on
the
scalp
,
they
form
the
distinctive
turban
tumor
feature
.
Malignant
cylindromas
are
very
rare
.
Malignant
transformation
may
____________________
within
solitary
cylindromas
,
____________________
they
may
complicate
____________________
multiple
variant
(
more
common
)
.
