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Table 3 Types of canine mammary columnar cell lesions and associated ductal hyperplasia in presence of different tumors types.

From: Columnar cell lesions of the canine mammary gland: pathological features and immunophenotypic analysis

Tumor types(**)

CCC(%)

CCH(%)

FEA(%)

Total(%)

 

DH

ADH

DH

ADH

DH

ADH

 

invasive carcinomas

3 (11.5)

3 (11.5)

1 (50.0)

1 (50.0)

-

3 (17.6)

11 (24.4)

ductal carcinoma in situ

2 (7.7)

2 (7.7)

-

-

3 (17.6)

4 (23.5)

11 (24.4)

benign tumors

10 (38.5)

4 (15.4)

-

-

1 (5.9)

1 (5.9)

16 (35.6)

without tumor

2 (7.7)

-

-

-

1 (5.9)

4 (23.5)

7 (15.6)

Total

17 (65.4)(*)

9 (34.6)

1 (50.0)

1 (50.0)

5 (29.4)

12 (70.6)(*)

45 (100)

  1. (*)Flat epithelial atypia is often associated with ductal hyperplasias with atypia (ADH) and columnar cell changes witout atypia are more frequent in hyperplasias without atypia (UDH) (19/30) (P < 0.05).
  2. (**)Misdorp,1999. International Histological Classification of Tumors of Domestic Animals.
  3. CCC: columnar cell change; CCH: columnar cell hyperplasia without atypia; FEA: flat epithelial atypia; DH: ductal hyperplasia without atypia; ADH: atypical ductal hyperplasia;