Table 2.

Mammographic and sonographic findings of 11 cases of metaplastic carcinoma of the breast with histologic subtype classification.

Case	Histologic subtype	Mammographic findings			Sonographic findings
		Shape	Margins	Calcification	Mass shape	Margins	Echo structure	Posterior acoustic findings
1	Squamous cell	Oval mass	Non-circumscribed	+ (suspicious)	Irregular	Non-circumscribed	Complex	Enhancement
2	Carcino-sarcoma	Oval mass	Non-circumscribed	+ (suspicious)	Irregular	Non-circumscribed	Complex	None
3	Spindle cell	Oval mass	Partially circumscribed	–	Oval	Non-circumscribed	Solid hypo-echoic	Shadowing
4	Matrix producing	Global asymmetry	Non-circumscribed	+ (suspicious)	Irregular	Non-circumscribed	Complex	Shadowing
5	Carcino-sarcoma	Oval mass	Non-circumscribed	+ (suspicious)	Oval	Circumscribed	Complex	Enhancement
6	Spindle cell fibromatosis-like variant	Round mass	Circumscribed	–	Oval	Circumscribed	Solid hypo-echoic	None
7	Squamous cell	Irregular mass	Non-circumscribed	–	Oval	Partially circumscribed	Complex	Enhancement
8	Squamous cell	NA	NA	NA	Oval	Circumscribed	Complex	Enhancement
9	Carcino-sarcoma	NA	NA	NA	Oval	Partially circumscribed	Complex	Enhancement
10	Matrix producing	Oval mass	Partially circumscribed	–	Oval	Partially circumscribed	Complex	Enhancement
11	Matrix producing	Focal asymmetry	Non-circumscribed	–	Irregular	Non-circumscribed	Complex	None

Note: NA – not available.