J.Jpn. Surg. Soc.. 91(3): 373-385, 1990

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Original article

CLINICOPATHOLOGIC STUDY ON VENOUS INVASION OF COLO-RECTAL CANCER ; APROSPECTIVE STUDY

Metachronous liver metastasis developed less than in 5% of v0 and v1 groups, while it developed in 22% of v2 and v3 groups. In addition, it developed in 15% of EF (I) group, in 19% of EF group, in 10% of Intramural> Extramural group and in 16% of the Intramural≦Extramural group. Six-year survival rate of v0, v1, v2 and v3 groups in the cases of curative resection for advanced colo-rectal cancer were 97%, 85%, 57% and 51%, respectively.
Also those of E, EF, EI (F), Intramural, Intramural＞Extramural and Intramural≦Extramural groups were 83%, 65%, 55%, 86%, 80% and 55%, respectively. Non-hematogenous recurrence developed in 19.4% of v3 group, in 13.6% of EF (I) group and in 15% of Intramural≦Extramural group. Conclusions were as follows : ① There was a close relationship between venous invasion and development of liver metastasis (or of non-hematogenous recurrence) and survival of patients. ② It was proved that the diagnostic criteria of venous invasion established by the authors were good indices to predict survival of colorectal cancer patients.

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