Pityriasis Rosea

00:01 Our topic now brings us to a condition called pityriasis rosea.

00:06 So, if you’re not familiar with dermatology or dermatology is quite weak, then there are a lot of conditions here.

00:10 The terms, my goodness, they sound quite alike.

00:13 This is pityriasis rosea, and all that I’m walking you through are going to be the high-yield ones.

00:18 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.

00:33 The last time we saw the term that may resemble rosea, was rosacea, right? Remember that? And as soon as you hear rosacea, think of a rose, the nose, being the color of your nose.

00:46 In other words, in an adult male, rhinophyma, if you remember that.

00:50 That was acne rosacea.

00:52 The triggers there included your spicy food, maybe stress and alcohol and such.

00:56 Completely different topic here of dermatology known as pityriasis rosea.

01:01 So in terms of cause, really, unknown idiopathic.

01:04 Self-limited, that’s important, usually found in young people.

01:08 And possibly through or thought to be caused by HHV7 or human herpes virus 7.

01:16 Pityriasis rosea.

01:19 Let’s talk further in terms of morphology.

01:21 Follows a viral prodrome.

01:23 Say for example, HHV7.

01:26 There’s a condition or description known as a T-shirt type of distribution.

01:31 And by t-shirt, imagine what you’re going to wear, and on your back, is what you’re paying attention to.

01:37 Erythematous papule or plaque, meaning red.

01:40 Now, usually, the first lesion down by the trunk is called the Herald patch.

01:45 It’s often the largest, and that is your first sign.

01:49 Memorize your Herald patch, usually found by the trunk.

01:53 And then what ends up happening is that you then have this Christmas tree type of pattern on the back.

01:59 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.

02:08 But in terms of how long this lasts, we’re talking about weeks.

02:14 When would you most likely see this? In this young patient, during cold winter months, cold winter months.

02:21 So clinical pearls of pityriasis rosea: number one, you begin as a Herald patch down by the trunk.

02:29 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.

02:37 During winter months is when this patient is going to develop this condition.

02:42 It’s self-limited, so you’re looking at anywhere between six to eight weeks in which your condition then goes away, self-limited.

02:49 Take a look at your pityriasis rosea.

02:52 What I’m showing you here would be areas in the skin in which it maybe begin in the back by the neck.

02:57 But here, I’m showing you the front.

02:59 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.

03:07 Requires no treatment, self-limited.

03:10 So, it’s just a matter of time.

03:11 The most important thing is for you to diagnose this so that you do not give unnecessary treatment to this patient.

03:19 Young, winter, Christmas tree type of pattern, Herald patch.