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Table 2 Feline mammary tumors classified according to Elston and Ellis grading system [31]

From: Spontaneous feline mammary intraepithelial lesions as a model for human estrogen receptor- and progesterone receptor-negative breast lesions

Histological pattern totals Number of tumors graded as
   Well differentiated Moderately differentiated Poorly differentiated
   (WDC) (MDC) (PDC)
Tubulopapillary carcinoma 123 24 76 23
Solid carcinoma 42 0 9 33
Squamous cell carcinoma 3 0 0 3
totals 168 24 85 59
%   14% 51% 35%