Difference between revisions of "Melanocytic lesions"

Melanocytic lesions (view source)

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 *S-100 +ve.
 *Ki-67 -- only rare cells.
+==Solar lentigo==
+===General===
+*Benign.
+Fits into the larger category of ''lentiginous melanocytic proliferations'' - these include:<ref name=Ref_Derm438>{{Ref Derm|438}}</ref>
+*Solar lentigo.
+*Lentigo simplex.
+*Lentiginous nevus.
+*Lentiginous melanoma in situ.
+===Gross===
+Features:<ref name=Ref_Derm438>{{Ref Derm|438}}</ref>
+*Small (< 4 mm), irregular brown macule.
+*Usu. sun-exposed area.
+===Microscopic===
+Features:<ref name=Ref_Derm437>{{Ref Derm|437}}</ref>
+*Hyperpigmented melanocytes - may be present in increased quantities - '''key feature'''.
+**Classically at the tips of the rete ridges.
+*No (melanocyte) nuclear atypia.
+Notes:
+*Should ''not'' be present:<ref name=Ref_Derm438>{{Ref Derm|438}}</ref>
+**Nests of melanocytes.
+**Pagetoid spread of melanocytes.
 ==See also==