Common food dyes, preservatives and additives. Nitrosamines are formed in the gut from nitrates in fertiliser and meat colouring. Medical immunotherapy involves reintroducing cultivated killer T-cells to boost natural defences. Melanomas are cancerous growths of melanocytes, skin cells that produce the pigment melanin. Sarcoma - very malignant tumours of the connective tissues, muscle, bone and cartilage.
Lymphoma is a malignant disease of lymphatic tissue, causing excess lymphoid cells.
Multiple myeloma occurs in bone marrow causing excess plasma cells. The cells lose the ability to differentiate from one another and form clumps and invade surrounding tissues. As the cancer develops, the tumour obtains its own blood supply for nourishment and elimination, competing with normal tissues for space and nutrients. Cancer cells have the ability to migrate into the blood or lymph system where a weak immune system may fail to prevent their spread. They are also able to move directly through surrounding tissues with the aid of pseudopodia.