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Difference between revisions of "Melanocytic lesions"
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→Overview: more nevi
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| lentil-shaped (ovoid) nests btw collagen bundles | | lentil-shaped (ovoid) nests btw collagen bundles | ||
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| <ref>WMSP P.501</ref> | | <ref>WMSP P.501.</ref> | ||
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| Cellular blue nevus | |||
| congenital or acquired; usu. scalp or butt | |||
| blue flat or raised lesion | |||
| deep dermis; cells lack nucleoli; biphasic: (1) epithelioid cells with pale cytoplasm, (2) pigmented spindle cells +/- melanophages | |||
| dermal lesion with pigmented spindle cells & epithelioid cells | |||
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| <ref>WMSP P.501.</ref> | |||
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| Congenital-pattern nevi | |||
| congenital or acquired | |||
| small, intermediate (2-20 cm) or large | |||
| extend along dermal structures (e.g. nerves, hair shafts, ducts); lacks atypia; +/-mitoses | |||
| growth along dermal structures | |||
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| <ref>WMSP P.501.</ref> | |||
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