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In this section we have spot diagnoses posted on a daily basis since June 2010, now over 1700! You can review the archived cases and read the suggested diagnoses by users and the final comment by Dr Uma Sundram, the Editor-in-Chief and main spot diagnosis host. Case are uploaded each week day by 10 a.m. UK time with the correct diagnosis will generally be posted at 8 p.m. UK time. Why not view the most recent spot diagnosis and proffer a diagnosis?

Case Number : Case 1938 - 02 Nov - Dr Arti Bakshi Posted By: Guest

Please read the clinical history and view the images by clicking on them before you proffer your diagnosis.
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53/M, raised red lesion on abdomen for 2 years.


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vincenzo polizzi

Posted

Difficult. Bcc-like stromal retraction. Irritated sk-like features. But there’s something more impressive to my eyes: panfollicular differentiation, including matrichal, m.p.b., infundibular differentiation...my spot is epidermal type panfolliculoma ( but it’s first time I make this diagnosis so am afraid I’m wrong)

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Favor inverted follicular keratosis. 

Intraepidermal proliferation of cuboidal cells with squamous eddies; basically an irritated seborrheic keratosis with inverted growth pattern (growing along the hair follicle or showing follicular differentiation).

Less common location, sebaceous lobules at the periphery are less common, and grouping appears unusual in my limited experience, but still comes closest to IFK.

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Dr. Hafeez Diwan

Posted

I was thinking poroma vs. inverted follicular keratosis. I favor poroma.

By the way, I have posted the diagnosis for yesterday's case. Sorry for the delay!

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Iskander H. Chaudhry

Posted

Hi All. I like the suggestion of poroma but the cells dont have the classic poroid appearance and no ductal differentiation is apparent. Some sections show a vague palisade, squamous eddies and 'follicular' differentiation.

I agree with the diagnosis of inverted follicular keratosis showing follicular differentiation. 

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Iskander H. Chaudhry

Posted

Dear all I havre also posted my post diagnosis from last week 

 

 

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Raul Perret

Posted

I thought of SEBK (inverted follicular keratosis)

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Arash Daryakar

Posted

Agree with inverted follicular keratosis.i think we have eddies.

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Arti Bakshi

Posted

My differentials were the same as above....a poroma with follicular differentiation vs inverted follicular keratosis. The architecture was poroma like but the cells were not particularly poroid. The frequent squamous eddies and lack of ductal differentiation made me favour an IFK too.

Well done all!

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