Invasive micropapillary carcinoma: A distinct type of adenocarcinomas in the gastrointestinal tract

Table 2 Characteristics of individual cases of colorectal invasive micropapillary carcinoma

Parameter	Sakamoto et al[19], 2005	Kuroda et al[18], 2007	Kondo et al[15], 2008	Wen et al[16], 2008	Hisanori et al[13], 2009	Sonoo et al[12], 2009	Otsubo et al[30], 2011
Age/ Sex	67/M	70/F	70/M	72/F	71/F	64/M	26/F
	68/F
	53/F
Location
Colon	3	1	1	1	1	1	1
Rectum	0	0	0	0	0	0	0
Unspecified	0	0	0	0	0	0	0
Tumor size
< 5 cm		1	1	1	1	1	1
> 5 cm		0	0	0	0	0	0
Percentage of IMPC	PD	40%	5%	PD	PD	80%	ND
Adenocarcinoma type
Nonmucinous	2	1	1	1	1	1	1
Mucinous	1	0	0	0	0	0	0
Grade of malignancy (G)	G3-2	ND	G1	ND	ND	G2	G4
	G4-1
pT stage (T)	T3-3	T3	T1	T3	T1	T1	T3
Lymphovascular invasion (Yes/No)	Yes-2	Yes	Yes	ND	Yes	Yes	Yes
	No-1
Lymph node metastasis (N) (Yes/No)	Yes-3	Yes	No	Yes	Yes	Yes	Yes
Distant metastasis (M) (Yes/No)	No	No	No	No	Yes	No	Yes

PD: Predominant; ND: No data; M: Male; F: Female.