Canine Mammary Tumors as a Potential Model for Human Breast Cancer in Comparative Oncology

Table 1

Clinical and para-clinical data of 64 canine mammary tumors hospitalized in veterinary clinics and hospitals in Tehran during 2010–2020.

Variable	No.	Frequency (%)
Age (years)
≤8	23	35.94
9–11	21	32.81
≥12	20	31.25
Tumor size (cm)
<3	31	48.44
3.1–4.9	26	40.62
≥5	7	10.94
Laterality
Right	28	43.75
Left	36	56.25
Lymph node status
N0	50	78.12
N1	14	21.88
Vascular invasion
Absent	29	45.31
Present	35	54.69
Perineural invasion
Absent	51	79.69
Present	13	20.31
Necrosis
Absent	39	60.94
Present	25	39.06
Type of surgery
Simple mastectomy	36	56.25
Regional mastectomy	20	31.25
Radical mastectomy	8	12.5
Histological grade
Grade 1	27	42.19
Grade 2	25	39.06
Grade 3	12	18.75
TNM stage
Stage I	31	48.44
Stage II	20	31.25
Stage III	13	20.31