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What
is papilloma?
A papilloma is a warty growth of the larynx caused by a virus. Different
types of the same family of viruses cause similar growths elsewhere
in the body. The papilloma virus is probably transmitted from person
to person by intimate contact. However, not everyone with who comes
into contact with the virus will develop papillomas, and it may be
that some people carry the virus unwittingly without developing growths,
so understanding transmission is not straightforward. The growth of
the lesions of papilloma probably represents an interaction between
the virus and a susceptibility in a given person’s immune system.
Voice use has no bearing on the formation of papillomas.
Papilloma
is best known as a disease of young children, many of whom
appear to be infected by passage through the birth canal
(genital warts are caused by a papilloma virus). However,
it can also affect adults. In adults, it is generally less
aggressive than in children, meaning that papillomas grow
slower and are less likely to grow outside of the larynx.
Like
warts, papillomas are very resilient lesions which tend
to grow back no matter how completely they are removed.
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What are the symptoms of papilloma?
Papilloma generally causes painless hoarseness, roughly in proportion
to its size and bulk. If allowed to grow unchecked, it may block the
airway.
What does papilloma
look like?
Papilloma has a characteristic
appearance of a stippled mass, not unlike a raspberry. These surface
irregularities, called papillae, give the growth its name.
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Figure
1: This magnified operating
room view (upside down
from the other photographs) shows the typical stippled
appearance of a bulky Papilloma on the left vocal fold.

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Papilloma
is a surface lesion, which grows outward from the mucosa .
For reasons unknown, human papilloma virus seems to prefer
the mucosa of the vocal fold, although lesions can and
do grow on surrounding surfaces. In adults, papilloma may
be confined to a single area of the vocal fold, and grow
mimicking the appearance of a polyp, or it may extend over
the entire surface of one, or even both vocal folds. |
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Figure
2: This single papilloma
in an adult resembles a
polyp in
appearance. It did not come back following surgical removal.

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In very rare cases, usually when there is immune disease, papilloma
may extend outside of the larynx to involve the mouth,
the throat and the lungs. There have been reports of papilloma
turning into cancer, but this is also a rare event.
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Figure
3: The large papilloma
on the vocal fold on the right is accompanied
by
more smaller papillomas over both vocal folds, seen
as
smooth bulges. This person has already had two
surgeries.

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How
is papilloma treated?
There
is no reliable cure for papilloma. Surgery,
which remains the mainstay of treatment, is
used to keep the disease in check, but regrowth
of papillomas is usually the rule, no matter
how complete the excision. In some cases of
disease in adults, particularly if the disease
is limited to one site in the larynx, papilloma
may disappear after one or a few surgical removals.
This is probably due to a person’s own
immune system mounting an effective defense
against recurrence.
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Because
surgery does not cure papillomatosis, functional considerations,
like voice quality, remain relevant in the operating room.
There is often nothing to be gained from an aggressive resection
that irreversibly compromises voice. Also, papillomatosis
is a superficial disease. A surgery that removes deep tissue
with the laser is not necessary and can cause damage.
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If
the disease recurs, repeat surgery is determined by disease bulk
and impairment to voice. In people with widespread disease across
the larynx, there is generally little reason to re-operate for
each small area of recurrence, if it is not causing symptoms.
This may be difficult for an affected person to accept, but operating
more often does not affect the overall course of the disease,
and may unnecessarily expose a person to the risks of surgery
and cumulative damage from scar.
Because the mucosa of the vocal fold must be removed in the area
of papilloma, healing often results in impaired vocal fold vibration
(see Normal
Voice Function). It is rare that extensive disease
can be operated multiple times without some permanent change
in voice.
In
the case of person who genuinely requires frequent surgery
(and it may be called for as often as every month or two
in exceptional cases), it is reasonable to consider investigational
therapy. Because of the frustrating nature of the disease,
there are a wide variety of alternative and investigational
treatments, some better tested than others. Currently,
medical focus rests upon cidofovir, a drug used intravenously
against other viruses. In papillomas, it is injected directly
into the lesions, and appears to help retard recurrence
in aggressive disease. In a few cases, it appears to have
eliminated recurrence, and these people are being closely
followed. Ideal dosing and frequency of administration
are currently being investigated. Researchers are also
looking into ways to modify a person’s immune system
so that it can better fight the disease.
There
are many other investigative treatments of varying merit.
To discuss them all requires a website devoted to the
topic. Fortunately, www.rrpwebsite.org is
a well-designed source of information regarding papilloma,
kept current and complete by its webmaster and the interaction
of its members.
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