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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 877 - 29th October Posted By: Guest

Please read the clinical history and view the images by clicking on them before you proffer your diagnosis.
Submitted Date :
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The patient is a 65 year old woman with an excision of a lesion on the center upper aspect of the forehead.


Case posted by Dr. Mark Hurt.


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Robledo F. Rocha

Posted

Burned-out pilomatricoma with osteoma-like features. Small amounts of basophilic matrical / supramatrical cells can be found turning abruptly into metaplastic bone. Some of these cells display trichohyalin granules, an evidence of differentiation toward the lowermost part of the inner root sheath (Huxley's layer). No convincing shadow cells can be discerned at all.

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Guest Juan Carlos Garcés, Ecuador

Posted

ossified pilomatricomaossified pilomatricomaNiceNice ossified pilomatrixoma

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Guest Juan Carlos Garcés, Ecuador

Posted

Sorry for my comment, I dont know what happened

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Osteoma cutis derived from an ossified pilomatricoma.

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Guest Jim Davie MD

Posted

Osteoma cutis arising in involuting pilomatricoma.

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Mark A. Hurt MD

Posted

My diagnosis was pilomatricoma with ossification. I don't think I have seen a better example of it, and I have not seen it very often.

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Guest Giovanni Falconieri

Posted

What a case, dr Hurt! Very instructive comments from the forum as well. A spot dx case (#409) of pilomatricoma with comparable changes was posted early last year, although in that particular case osteoid formation was admixed with calcifications.

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