Answer : Oral lichen planus
Varying degrees of orthokeratosis and parakeratosis may be present on the surface of the epithelium
The thickness of the spinous layer can also vary.
The rete ridges may be absent or hyperplastic, but they classically have a pointed or “saw-toothed” shape
Destruction of the basal cell layer of the epithelium (hydropic degeneration) is also evident.
This is accompanied by an intense, bandlike infiltrate of predominantly T lymphocytes immediately subjacent to the epithelium
Degenerating keratinocytes may be seen in the area of the epithelium and connective tissue interface and have been termed colloid, cytoid, hyaline, or Civatte bodies.
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