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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 850 - 19th September 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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53 year-old male with a mass on the head of the penis.

Case posted by Dr. Hafeez Diwan.


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Guest Romualdo

Posted

The cyst wall is lined by pseudostratified columnar epihelium. I think this is median raphe cyst.

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Robledo F. Rocha

Posted

[font="Palatino Linotype, serif"][size="4"]This cystic lesion with predominantly stratified epithelial lining, I presumed located on the ventral surface of the penis, is median raphe cyst. A bilayered epithelial lining even might be construed as hidrocystoma [url="http://archderm.jamanetwork.com/article.aspx?articleid=540492"]if this entity really occurs on penis as something other than median raphe cyst[/url].[/size][/font]

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Guest Jim Davie MD

Posted

Median raphe cyst.

These may have a ciliated epithelial lining (which I can't see directly in the images above, but suspect may be present, given presence of the dark eosinophilic staining of the apical surfaces, suggestive of terminal bars associated with ciliated epithelium. Cilia have been reported in MRCs:
[url="http://www.medicaljournals.se/acta/content/?doi=10.2340/00015555-0286&html=1"]Median Raphe Cyst with Ciliated Cells of the Penis[/url] [the [url="http://www.medicaljournals.se/acta/content/download.php?doi=10.2340/00015555-0286"]PDF link[/url] version has better-quality images ]([i]Arch Dermatol. [/i][color=#333333][font=Helvetica, Arial, Verdana, sans-serif][size=3]1979;115(9):1084-1086). [/size][/font][/color][size=4] [/size]

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Hanan Vaknine MD

Posted

[size=4][font=Esprit-Book][font=Esprit-Book]The [font=Esprit-Book][font=Esprit-Book]unique clinical features and the histology (which can be quiet varied) are most consistent with Median Raphe Cyst, as mentioned above [/font][/font][/font][/font][/size]

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