Figure 4
Similar Patterns of Clonal Expansion. Left side shows normal mammary duct and surrounding differentiated tissues (top), compared to pre-cancerous hyperplastic ductal tissue with prominent glandular duct cells staining dark blue (bottom) (adapted from Atlas of Diagnostic Oncology, edited by Arthur Skarin; used with permission. Right side shows a differentiated urban area with various forms of residential, retail, and civic structures, compared to lower photo of suburban residential dwellings (top photo by John Ryan; bottom courtesy of Carlos Oscar Ruiz, used with permission).