Table 3.

Observation in metastasis breast cancer of the concordance between HER2/ECD and CA 15.3 changes and subsequent medical imaging conclusion (progression or regression of metastases) (an event = a medical imaging)

	All events n = 65		Bone metastases n = 20		Liver metastases n = 16		Lung metastases n = 9		Brain metastases n = 10		Multiple organ metastases n = 10
% HER2/ECD consistent with imaging conclusion	94		90		100		89		90		100
% CA 15.3 consistent with imaging conclusion	85		85		94		78		67		90

Imaging conclusion on metastasis evolution:	progression n = 35	regression n = 30	progression n = 8	regression n = 12	progression n = 8	regression n = 8	progression n = 6	regression n = 3	progression n = 7	regression n = 3	progression n = 6	regression n = 4
% HER2/ECD consistent with imaging conclusion	91	97	88	92	100	100	83	100	86	100	100	100
% CA 15.3 consistent with imaging conclusion	80	90	88	83	88	100	67	100	57	100	100	80