Table 3.

Characteristics on breast IMPC and IDC in previous seven reports and the present study

Author	Published time	No. of cases		Component of IMPC	Criteria of eligible patients	ER and PR	Nodal metastases	Lymphovascular invasion
		IMPC	IDC
Chen [4]	2008	100	100	Mixed	Randomly selected	Lower	Lower	\
Yu [8]	2010	72	144	Pure or more than 70 %	Age, pathologic tumor and node stage, treatment methods	Higher	Higher	Higher
Vingiani [14]	2013	49	98	Pure	Age, tumor size and grade	Higher	Higher	Higher
Liu [9]	2014	51	102	Pure	Nodal status and age	Higher	Higher	Higher
Shi [7]	2014	188	1289	mixed	Simple random sampling	Higher	Higher	Higher
Chen [10]	2014	636	297735	unknown	The same study period	Higher	Higher	\
Yu [16]	2015	267	267	Mixed	Age, pathologic tumor and node stage, treatment method	Similar	Similar	Higher
Present study	\	33	347	Mixed	The same study period	Higher	Higher	Higher

NO number, IMPC invasive micropapillary carcinoma, IDC invasive ductal carcinoma, ER estrogen receptor, PR progesterone receptor