Difference between revisions of "Non-malignant skin disease"

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rm dermal nevus ---> to melanocytic lesions
(rm dermal nevus ---> to melanocytic lesions)
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'''Non-malignant skin disease''' is relatively common.  The pathology may or may not be specific.  Some diseases require clinical information to diagnose.   
'''Non-malignant skin disease''' is relatively common.  The pathology may or may not be specific.  Some diseases require clinical information to diagnose.   


An introduction to dermatopathology is in the ''[[dermatopathology]]'' article.
An introduction to dermatopathology is in the ''[[dermatopathology]]'' article.  [[Nevi]] (moles) and other melanocytic lesions are dealt with in the article ''[[melanocytic lesions]]''.


==General classification (Inflammatory)==
==General classification (Inflammatory)==
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**''Molluscum bodies'' are only the epidermis - an uncommon place to find SRCs without finding them elsewhere.
**''Molluscum bodies'' are only the epidermis - an uncommon place to find SRCs without finding them elsewhere.
*The granular eosinophilic cytoplasm represents accumulated virons.
*The granular eosinophilic cytoplasm represents accumulated virons.
==Dermal nevus==
*Think ''melanoma''.
Clinical: ''ABCD'' = asymmetric, borders (irregular), colour (black), diameter (large).
===Microscopic===
Features:<ref>need ref</ref>
*Symmetrical lesion.
*"Matures" with depth - less cellular, less atypia.
*No destruction of surrounding structures.
*Only in dermis '''key feature'''.
**Otherwise it is something else, e.g. ''dermal nevus'', ''junctional nevus''.
===Microscopic===
*Basaloid cells mixed with squamous cells.
*Keratin-filled invaginations.
*Horn cysts - intraepidermal, brown globule-like structures.
**Melanocytes at the dermoepidermal junction.<ref>[http://emedicine.medscape.com/article/1059477-overview http://emedicine.medscape.com/article/1059477-overview]</ref>


==Pilomatricoma==
==Pilomatricoma==
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