| Nonneoplastic Epithelial Disorder of Skin and Mucosa |
| Lichen Sclerosis |
| Squamous Hyperplasia |
| Other Dermatoses |
| Intraepithelial Neoplasia |
| Squamous Intraepithelial Neoplasia |
| Mild Dysplasia |
| Moderate Dysplasia |
| Severe Dysplasia or Carcinoma in Situ |
| Nonsquamous Intraepithelial Dysplasia |
| Paget's Disease |
| Tumors of Melanocytes, Noninvasive |
| Invasive Tumors |
Explanation
This classification distinctly separates intraepithelial neoplasia from nonneoplastic conditions, facilitating the selection of clinical treatment methods and comparison of therapeutic effects.
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