We report a case of implantation of tumor cells within a fistula in ano. A 36-year-old man with a 16-year history of an anal fistula underwent an operation for rectal carcinoma. Three weeks later, the anal fistula was resected. A histological examination of the specimen showed atypical cells; moreover, rectal carcinoma had proliferated in the granulation tissue lying underneath the intact squamous epithelium. Because there was no continuity to the rectal carcinoma or the anal glands, we diagnosed implantation of rectal cancer cells in a fistula in ano.
Cardiotomy under block of venous circulation was performed on 30 experimental dogs. The limit of safety for circulatory block was confirmed to be about one minute. The rate of successful detection of filariae was 76% on the average, which was higher than that obtained by the K technique for the removal of heartworms.When the cardiotomy was applied clinically to 26 dogs, the survival rate of the dogs was 84.6% and the
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