The difference between carcinoma and sarcoma is cell of origin. If it is the carcinoma, it arises from the epithelial cells, which are cells in the glandular tissue or intestinal tissue where there is an epithelial surface, which takes it forward. From these cells if there is tumor that is arising, we call it carcinoma there is another tissue called as mesenchymal tissue in the body which is the supporting tissue of all the organs of the body or the cells in the body. This mesenchymal tissue of the body arises from this mesenchymal tissue, we call it sarcoma. But they have certain pattern of origin and pattern of distribution of the disease once where they are carcinomas or sarcomas. Carcinomas spread by lymphatics, that is the spread of carcinomas spread by lymph nodes. But there are certain exceptions to this. Sarcomas spread by blood, but there are one or two exceptions to this also. But these are the rules that they follow when they start from these particular cells.

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