Explain the Classification of Malignant Tumors
Malignant tumors can be classified as:
Carcinomas: These tumors arise from the epithelial lining (the squamous cells) e.g. skin, tongue, breast, stomach, large intestine (the latter three arise from the glandular tissues).
Sarcomas: these arise from the connective tissue e.g. bone, cartilage and fat.
Melanoma: arise from pigmented layers of skin e.g. pigmented moles.
Gliomas: these arise from the central nervous system e.g. brain and spinal cord.
Reticulo -endothelial tumors: these involve the lymphatic system.
Adenoma: the growth arises from a gland e.g. thyroid gland.