NEOPLASIA

Skin lesions examined cytologically can usually be placed in one of 3 categories:

  • Inflammation
    Characterized by the presence of inflammatory cells (i.e., macrophages, neutrophils, eosinophils).
  • Neoplasia
    Characterized by the presence of cells other than inflammatory cells, which have neoplastic characteristics.  May coexist with inflammation.
  • Non-neoplasic, noninflammatory (hyperplasias, cysts, etc.)
    Characterized by the presence of cells other than inflammatory cells, which are determined to be nonneoplastic. It is very difficult to distinguish between hyperplasia and benign neoplasia.  May coexist with inflammation.
It is helpful to divide neoplasms into one of the following three types:
 
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