Sonographic Assessment of the Normal and Abnormal Feline Mammary Glands and Axillary and Inguinal Lymph Nodes

Table 3

Relative frequencies (%) of the reproductive and ultrasound features (mammary glands, mammary ducts, and lymph nodes) in cats without (G1, n = 22) and with (G2, n = 10) mammary tumors.

Features	G1 (%)	G2 (%)
Reproductive
Neutered	63.6	30.0
Progestogens	31.2	100.0
Pregnancy	22.7	50.0
Mammary glands
Homogeneous	95.0	54.2
Heterogeneous	5.0	45.8
Hypoechoic	75.0	95.8
Isoechoic	25.0	0
Anechoic	0	4.2
Mammary ducts
Present	10.0	31.3
Absent	90.0	68.8
Mammary vascularization
Normal vascularization	95.5	10
Hypervascularization	4.5	90
Lymph nodes
Oval	100.0	57.1
Rounded	0	28.6
Lobed	0	14.3
Homogeneous	100.0	85.7
Heterogeneous	0	14.3
Hypoechoic	98.0	85.7
Hyperechoic	0	14.3
Isoechoic	2.0	0
Hyperechogenic central line	67.0	7.5
Regular margin	100.0	85.7
Irregular margin	0	14.3
Normal vascularization	100.0	85.7
Hypervascularization	0	14.3