Our topic here is lichen planus.
Be very careful.
I have described to you a condition
called lichen simplex chronicus.
Do not confuse one
with the other.
In lichen planus, thought to
be an autoimmune phenomenon.
Associated with hepatitis C
in areas of high prevalence.
With lichen planus, you automatically
pay attention to letter P.
And with that P,
it will give you the clinical pearls of your
particular morphology of lichen planus;
purple pruritic polygonal that
will coalesce and form plaques.
The five Ps with lichen planus.
Not to be confused with
lichen simplex chronicus.
Common in the wrists and hands.
So, you would have this purple polygonal,
and then you have your papules
that are going to
coalesce and form plaque,
and can also occur in the oral.
This can be oral or genital mucosa
If you take a look at
this morphology here,
you’ll notice that we have
not only a purplish papule
on the perimeter or periphery,
but then as you come closer, polygonal
and it coalesced to form a?
Autoimmune in nature,
destruction of the
and at the
Management: Limited disease treated
with potent topical steroids.
You have antihistamines may show to
help with the pruritus, that's it.
Extensive skin/mucosal disease
may require oral steroids.
And mucosal involvement is a
sign of more of a recalcitrant
and a longer lasting disease,
which is not a good sign.
Remember the one that I described
in the mouth,
Consultation with a dermatologist
or dentist is often recommended
so that you know as to what to do
with your patient cosmetically.