Table 1 Review of four reported cases (including the present case) of isolated LLN metastasis from a T1 rectal cancer
Case | Year | Author | Age (years) | Sex | Location of primary tumor | Risk factors of lymph node metastasis | ||||
|---|---|---|---|---|---|---|---|---|---|---|
Depth of invasion (μm) | Histological type | ly | v | Budding grade | ||||||
1 | 2008 | Hara | 61 | Male | Lower | – | Well | 0 | 0 | – |
2 | 2010 | Yamaguchi | 67 | Female | Lower | 3000 | Well to moderately | 0 | 0 | – |
3 | 2013 | Sueda | 41 | Female | Lower | – | Moderately | 0 | Positive | – |
4 | 2016 | Ogawa | 35 | Female | Lower | 3000 | Moderately | Positive | 0 | – |
5 | 2017 | Ours | 56 | Male | Upper | Head invasion | Moderately | 0 | 0 | 1 |