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**Thickness = granular layer ''or'' surface (no granular layer present) to deepest tumour. | **Thickness = granular layer ''or'' surface (no granular layer present) to deepest tumour. | ||
**Depth of invasion = epithelial-stromal junction in "valley" of papillae. | **Depth of invasion = epithelial-stromal junction in "valley" of papillae. | ||
DDx: | |||
*[[Classic vulvar intraepithelial neoplasia]] - esp. tangential sections. | |||
*[[Differentiated vulvar intraepithelial neoplasia]]. | |||
==Classic vulvar intraepithelial neoplasia== | ==Classic vulvar intraepithelial neoplasia== |
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