Table 3.
Characteristics of study group diagnosed with colorectal invasive micropapillary carcinoma
| Parameter | Kim et al[20], 2006 | Haupt et al[32], 2007 | Xu et al[44], 2009 | Verdú et al[10], 2011 | Lino-Silva et al[42], 2012 |
| No. of patients | 55 | 34 | 30 | 60 | 15 |
| Mean age, yr | 64 | 66 | 57 | 65.8 | 56 |
| Sex | F-15 | F-15 | F-13 | F- 23 | F-8 |
| M-40 | M-19 | M-17 | M-37 | M-7 | |
| Location | |||||
| Colon | 33 | 30 | 12 | 24 | 15 |
| Rectum | 22 | 2 | 18 | 36 | 0 |
| Unspecified | 0 | 2 | 0 | 0 | 0 |
| Percentage of IMPC | 5%-80% | 5%-60% | 5%-75% | 5%-30% | 10%-80% |
| Adenocarcinoma type | |||||
| Nonmucinous | 55 | 29 | 29 | 57 | 15 |
| Mucinous | 0 | 5 | 1 | 3 | 0 |
| Grade of malignancy (G) | |||||
| G1 | 5 | 1 | 13 | 23 | 0 |
| G2 | 43 | 26 | 0 | 30 | 0 |
| G3 | 7 | 7 | 0 | 7 | 6 |
| G4 | 0 | 0 | 17 | 0 | 9 |
| pT stage (T) | |||||
| T1 | 2 | 3 | 0 | 3 | 0 |
| T2 | 4 | 5 | 5 | 9 | 0 |
| T3 | 45 | 24 | 25 | 38 | 9 |
| T4 | 4 | 2 | 0 | 10 | 6 |
| Lymphovascular invasion | Yes-25 | Yes-14 | Yes-10 | Yes-28 | Yes-5 |
| (LV) (Yes/No) | No-30 | No-20 | No-20 | No- 32 | No-10 |
| Lymph node metastasis (N) | Yes-41 | Yes-25 | Yes-19 | Yes- 38 | Yes-15 |
| (Yes/No) | No-14 | No-9 | No-11 | No-12 | No-0 |
| Distant metastasis (M) | Yes-13 | Yes-4 | Yes- 1 | Yes-10 | Yes-3 |
| (Yes/No) | No-42 | No-30 | No-29 | No-50 | No-12 |
| Correlations | N, M, TNM stage | N | G, N, TB | T, TNM stage, N,M, VI, PI | G, N, TNM stage |
PD: Predominant; ND: No data; M: Male; F: Female; VI: Venous vessel invasion: PI: Perineural invasion.