Our topic now brings us to a
condition called pityriasis rosea.
So, if you’re not familiar with
dermatology or dermatology is quite weak,
then there are a lot
of conditions here.
The terms, my goodness,
they sound quite alike.
This is pityriasis rosea,
and all that I’m walking you through
are going to be the high-yield ones.
Remember, there are hundreds of conditions
which I am not referring to in our section
just because I want to make sure that we
keep things very, very clear, and organized,
and also, commonly asked
on the wards and boards.
The last time we saw the term that may
resemble rosea, was rosacea, right?
And as soon as you hear rosacea,
think of a rose, the nose,
being the color of your nose.
In other words, in an adult male,
rhinophyma, if you remember that.
That was acne rosacea.
The triggers there included your spicy
food, maybe stress and alcohol and such.
Completely different topic here of
dermatology known as pityriasis rosea.
So in terms of cause, really,
Self-limited, that’s important,
usually found in young people.
And possibly through or
thought to be caused by HHV7
or human herpes virus 7.
Let’s talk further in
terms of morphology.
Follows a viral prodrome.
Say for example, HHV7.
There’s a condition or description known
as a T-shirt type of distribution.
And by t-shirt, imagine what
you’re going to wear,
and on your back, is what
you’re paying attention to.
Erythematous papule or
plaque, meaning red.
Now, usually, the first lesion down by
the trunk is called the Herald patch.
It’s often the largest, and
that is your first sign.
Memorize your Herald patch,
usually found by the trunk.
And then what ends up happening
is that you then have this Christmas
tree type of pattern on the back.
So imagine what an evergreen tree
or a Christmas tree would look like
in which distribution would kind of be like
a triangle over the course of the back.
But in terms of how
long this lasts,
we’re talking about weeks.
When would you most
likely see this?
In this young patient,
during cold winter months,
cold winter months.
So clinical pearls
of pityriasis rosea:
number one, you begin as a
Herald patch down by the trunk.
Number two, think of a Christmas
tree type of pattern on your back,
and when you think about Christmas,
obviously, you’re thinking about winter.
During winter months is when this patient
is going to develop this condition.
It’s self-limited, so you’re looking
at anywhere between six to eight weeks
in which your condition then
goes away, self-limited.
Take a look at your
What I’m showing you here
would be areas in the skin
in which it maybe begin
in the back by the neck.
But here, I’m showing
you the front.
But if you look at the
back of this individual,
then you’ll notice that
this rosea type of pattern
will be in a Christmas
tree type of pattern.
Requires no treatment,
So, it’s just a matter of time.
The most important thing is
for you to diagnose this
so that you do not give unnecessary
treatment to this patient.
Christmas tree type of pattern,