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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 916 - 23rd December 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 41 year old white man with a punch biopsy taken from the left posterior shoulder.

Case posted by Dr. Mark Hurt


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Eman El-Nabarawy

Posted

Hobnail hemangioma(targetoid hemosiderotic hemangioma).

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Guest Romualdo

Posted

Hobnail hemangioma, with typical biphasic pattern.

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[color=#1C2837][font=arial, verdana, tahoma, sans-serif][size=4]Hobnail haemangioma.[/size][/font][/color]

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Dr. Mona Abdel-Halim

Posted

Beautifully demonstrated hobnail hemangioma,,, amazing :-)

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Robledo F. Rocha

Posted

[size="4"]Hobnail hemangioma (targetoid hemosiderotic hemangioma) showing its classic biphasic appearance of superficial dilated vessels with plump endothelial cell lining, and deep slit-like vessels between collagens bundles and around an eccrine coil.[/size]

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Mark A. Hurt MD

Posted

Here are some immunostains. Does this change your diagnosis?

[img]https://dermpathpro.com/uploads/spot_diagnosis_comment_img/CASE916_Image%2006.jpg[/img]

[img]https://dermpathpro.com/uploads/spot_diagnosis_comment_img/CASE916_Image%2007.jpg[/img]

[img]https://dermpathpro.com/uploads/spot_diagnosis_comment_img/CASE916_Image%2008.jpg[/img]

[img]https://dermpathpro.com/uploads/spot_diagnosis_comment_img/CASE916_Image%2009.jpg[/img]

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Eman El-Nabarawy

Posted

After seeing the immunostains. Still my diagnosis is hobnail hemangioma.

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Guest Jim Davie MD

Posted

Agree with hobnail hemangioma. There is perivascular pigment/hemosiderin in the deep dermis. Clinical is typical location.

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Mark A. Hurt MD

Posted

Congratulations, everyone! My diagnosis was targetoid hemosiderotic hemangioma. I prefer THH to "hobnail hemangioma," as THH takes into consideration a common clinical presentation of these lesions.

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