Difference between revisions of "Melanocytic lesions"

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Melanocytic lesions (view source)

Revision as of 01:30, 6 December 2013

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→‎Pigmented spindle cell nevus: split-out
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==Pigmented spindle cell nevus==
==Pigmented spindle cell nevus==
*[[AKA]] ''pigmented spindle cell nevus of Reed''.
*[[AKA]] ''pigmented spindle cell nevus of Reed''.
 
{{Main|Pigmented spindle cell nevus}}
===General===
*Uncommon.
*Women in teens & 20s.
*Location: shoulder, pelvic girdle region.
 
===Microscopic===
Features:<ref name=Ref_WMSP500>{{Ref WMSP|500}}</ref>
*Nests of heavily pigmented spindle cells at dermal-epidermal junction - '''key feature'''.
**Nevoid cells in epidermis & dermis - form "basket weave" pattern
*Well-circumscribed lesion.
 
Notes:
*No epithelioid nevus cells.
 
DDx:
*[[Spitz nevus]].
*[[Malignant melanoma]].
 
====Images====
<gallery>
Image:Pigmented_spindle_cell_nevus_-_low_mag.jpg | PSCN - low mag. (WC)
Image:Pigmented_spindle_cell_nevus_-_2_-_intermed_mag.jpg | PSCN - intermed. mag. (WC)
Image:Pigmented_spindle_cell_nevus_-_2_-_high_mag.jpg | PSCN - high mag. (WC)
</gallery>
www:
*[http://www.histopathology-india.net/Reed.htm Reed nevus - collection (histopathology-india.net)].
 
===Sign out===
<pre>
SKIN LESION, RIGHT POSTERIOR NECK, EXCISION:
- PIGMENTED SPINDLE CELL NEVUS OF REED.
-- COMPLETELY EXCISED (CLEARANCE ~ 1 MM).
</pre>
 
====Micro====
The sections show spindled pigmented melanocytes in nests confined to the epidermis.
The lesion is symmetrical in its architecture and pigment distribution. There is no
pagetoid spread of melanocytes in the epidermis. No significant nuclear atypia is
identified. No mitotic activity is appreciated. Melanophages are present in the superficial
dermis. The lesion is completely excised in the plane of section.


==Spitz nevus==
==Spitz nevus==
Michael
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