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

Table 4 Invasive micropapillary carcinoma of the stomach

Parameter	Shimoda et al[17], 2008	Roh et al[31], 2010	Eom et al[40], 2011	Ushiku et al[21], 2011	Fujita et al[22], 2012	Ninomiya et al[46], 2013	Ohtsuki et al[33], 2013
No. of patients	1	11	72	17	14	1	4
Mean age, yr	74	66	70	67	62	69	69-79
Sex	M	F-3	F-18	F-3	F-4	M	F-2
		M-8	M-54	M-14	M-10		M-2
Location
Upper-third	0	1	8	6	3	1	2
Middle	1	2	20	6	7	0	1
Lower-third	0	8	44	5	4	0	0
Tumor size
< 5 cm	1	5	40	17	14	1	2
> 5 cm	0	6	32	0	0	0	3
Percentage of IMPC	PD	5%-70%	5%-80%	10%-90%	> 10%	PD	ND
Adenocarcinoma type
Tubular	Absent	Both	21	16	9	ND	2
Papillary		9/11	43	12	4		2-mixed
Grade of malignacies (G)
G1	0	ND	11	ND	6	ND	ND
G2	0	2/11	38		7
G3	1	ND	23		1
G4	0	ND	0		0
pT stage (T)
T1	0	3	20	2	0	0	0
T2	0	4	52	8	6	0	1
T3	1	2		5	8	1	2
T4	0	2		2	0	0	4
Lympho-vascular invasion (LV) (Yes/No)	Yes	Yes-10	Yes-56	Yes-17	Yes11	Yes	Yes-1
		No-1	No-16	No-0	No-3		No-3
Lymph node metastasis (N) (Yes/No)	Yes	Yes- 4	Yes-62	Yes-14	Yes	Yes	Yes-3
		No-7	No-10	No-3			No-1
Distant metastasis (M) (Yes/No)	No	ND	ND	ND	No	No	ND

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