Table 4. Characteristics of patients with LS-related SIAC.
| Characteristics (n = 8) | n | |
|---|---|---|
| Relatives with LS-related tumors | 0 | |
| Clinicopathologic factors | ||
| Age (years) | ≤50 | 5 (63%) |
| >50 | 3 (37%) | |
| Sex | Male | 6 (75%) |
| Female | 2 (25%) | |
| Location | Proximal (duodenum) | 4 (50%) |
| Distal (jejunum, ileum) | 4 (50%) | |
| Growth pattern | Polypoid | 1 (12%) |
| Infiltrative | 7 (88%) | |
| Histologic type | Tubular | 5 (63%) |
| Mucinous | 3 (37%) | |
| Grade | Low | 8 (100%) |
| pT classification | pT3 | 4 (50%) |
| pT4 | 4 (50%) | |
| pN classification | pN0 | 3 (37%) |
| pN1 + pN2 | 5 (63%) | |
| Pancreas invasion | 3 (37%) | |
| Other loop invasion | 0 | |
| Retroperitoneal seeding | 1 (12%) | |
| Lymphovascular invasion | 3 (37%) | |
| Perineural invasion | 2 (25%) | |
| Chronological order of cancer detection | ||
| SIACs as the first malignancy | 3 (37%) | |
| Synchronous SIAC and GC | 1 | |
| First SIAC and second CRC | 1 | |
| First SIAC and second brain tumor | 1 | |
| SIACs as the second malignancy | 5 (63%) | |
| First CRC and second SIAC | 4 | |
| First GC, second SIAC, and third GC | 1 | |
Abbreviations: GC, gastric carcinoma; CRC, colorectal carcinoma.