There are a large variety types of cancer which are classified according to the tissue and cell type from which they derive: carcinoma(arising from epithelial cells), sarcoma (from connective tissue or muscle cells), leukemia and lymphoma (from hemopoietic cells), cancers derived from cells of nervous system etc EPITHELIUM=> CARCINOMA (About 80%of human cancers Basal Lamina Collagen MESENCHYMAL ORIGIN >SARcoMA … fibro|asts … blood vessels blood cells muscle … adipocytes(fat) bone car tilage◼ There are a large variety types of cancer which are classified according to the tissue and cell type from which they derive: carcinoma (arising from epithelial cells), sarcoma (from connective tissue or muscle cells), leukemia and lymphoma (from hemopoietic cells), cancers derived from cells of nervous system etc. (About 80% of human cancers)