Usual hyperplasia is a form of proliferative disease of the breast without atypia. This material was provided by Dr. Roy Jensen, Vanderbilt.
| This slide sets
out the quantitative criteria.
The adjectival designations mild, moderate and florid are quantitative assessments of extent.
| These are the
criteria for recognition.
| This slide illustrates
the criteria for recognition of usual hyperplasia.
The hallmark of usual hyperplasia or proliferative disease without atypia (PDWA) is variability. Each cell within the lesion has a different size, shape and orientation in comparison to adjacent cells. In addition, the secondary spaces are quite irregular in shape with a tendency to form small slit-like spaces.
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