Alright, now we can move
on to a quick review.
So I'll ask a question, you can pause the
screen and come up with the answer on your own
and then we'll go ahead
and review the answer.
All of the following are common
causes of telogen effluvium except?
Okay, bariatric surgery - very common cause.
hypothyroidism - also something that we could see
Cutaneous lupus erythematosus.
As we discussed before, that is one of
the cicatricial causes of alopecia,
scarring type with lots of inflammation,
it's not gonna cause telogen effluvium.
Malnutrition and pregnancy however are definitely on our
list of stressors that can cause telogen effluvium.
So our answer is number 3
Which of the following is true of alopecia areata?
Okay, so commonly associated
with systemic scleroderma?
Not so much.
You'd really see it with autoimmune conditions such
as Hashimoto's thyroiditis, Addison's, vitiligo.
So that's false.
Number 2 - Affected lesions often resolve with scarring
That's also false, there's actually no evidence
of inflammation, grossly visual on the scalp .
May be treated with topical azole shampoos.
That's gonna be how you would treat
tinea captitis but not alopecia areata,
you'd use steroids for alopecia areata.
Number 4- is commonly associated with nail pitting.
Well that's true actually, nail pitting
we oftentimes think of as with psoriasis
but you can also see it with alopecia areata
especially if you also see evidence of nail dystrophy.
And lastly, lesions tend to
be symmetrically distributed
As we talked about before, alopecia areata kind
of picks different areas of the scalp at random
and there's no symmetry to it whatsoever.
So our answer is clearly number 4.
Last question, an 8-year old girl presents
with a focal area of hair loss as shown.
The lesion is pruritic and the exam reveals some
broken hair shafts, mild erythema and scale.
What's the most likely diagnosis?
Totally not fair.
We didn't even cover tinea capitis in any detail.
But that's exactly what this is.
It's a relatively common dermatophyte
infection in preadolescent kids.
Now if left untreated, it can
progress to a scarring alopecia
but usually if you catch it early, it
should resolve completely with treatment.
Now unlike some other tinea infections, tinea
capitis almost always requires oral treatment.
with for example oral ketoconazole or fluconazole.
Though you can certainly tro and
get by with a shampoo at first
That's the end of our questions.