proliferative actinic keratosis

In proliferative actinic keratosis, there is a strong propensity to transform into an invasive squamous cell carcinoma.

Nests of atypical cells extend as finger-like projections into the upper dermis.

It has a pseudo-infiltrative appearance.

Extension down hair follicles and, less frequently, acrosyringia may be present.

A heavy inflammatory cell infiltrate of lymphocytes and some plasma cells is often present

See also

 actinic keratosis