The experience of Karolinska Hospital with colorectal carcinoma over a 30-year period, 1950 through 1979, was reviewed and analyzed. Altogether, 1061 patients were seen; 69 per cent were resected with the intention of cure. The proportion of curative resections did not change with time. Operative mortality decreased from 12 to slightly over 1 per cent. Five-year survival rates were 34 per cent overall and 47 per cent in curable cases. After correction for operation mortality, the latter rate increased from 47 to 58 per cent over the study period (no significance). Sex and age were not correlated with survival. Of tumors resected for cure, 28 per cent were Dukes' A, 39 per cent Dukes' B, and 33 per cent Dukes' C. Corresponding five-year survival rates were 82, 44, and 21 per cent. Though the proportion of Dukes' A tumors increased from 23 to 33 per cent over the 30-year interval, the impact on overall prognosis was insignificant. A possible over-diagnosis of Dukes' A is discussed. The proportion of sphincter-saving procedures for rectal carcinoma increased moderately; excisional and restorative procedures were equal with respect to mortality and survival. Some patients underwent local excisions for Dukes' A rectal carcinomas with a close to 90 per cent five-year survival.

Adenocarcinoma↗

PubMedDate not supplied

Early effects of preoperative irradiation upon the cell cycle composition in rectal adenocarcinomas. A flow-cytometric DNA investigation.

The DNA patterns were studied by means of flow cytometric analysis in 43 rectal adenocarcinomas. Ploidy level and cell cycle distribution were related to clinical stage and histopathology. The frequency of grossly aneuploid tumours and tumours with multiple aneuploid cell populations increased with more advanced clinical stages and with the degree of dedifferentiation. In 15 cases the DNA pattern was studied before and after preoperative irradiation. The ploidy level was not affected by irradiation. A pronounced increase in the proportion of G2 cells was found after irradiation. This G2 blockage was proportional to the amount of S-phase cells before irradiation. Since following irradiation the proportion of S-phase cells was low and the proportion of G1 cells unchanged, the existence of a high fraction of resting G1 tumour cells can be assumed.

Adenocarcinoma↗