Hemochromatosis is an obvious iron disease; cancer is a subtle iron disease. See: Aneuploidy Theory of Cancer and Ferromagnetic Theory of Cancer. German pathologist David Hansemann observed (in 1891) asymmetric mitoses in all of the epithelial cancers he examined. This led him to the hypothesis that, The cell of the malignant tumor is a cell with a certain abnormal chromatin content. German biologist Theodor Boveri formulated (in 1914) the aneuploidy theory of cancer. But most researchers have dismissed phenomenon aneuploidy as a byproduct of cancer, not the cause. With the rise in the 1970s of the oncogene theory, the idea that aneuploidy was a cause of cancer was left in the dust. American molecular biologist Peter Duesberg revived the aneuploidy theory in 1997. The prevailing oncogene theory ascribes cancer to a handful of single-gene mutations that sends cells into uncontrolled growth. The aneuploidy theory, on the other hand, hypothesizes that cancer arises from a cell with an abnormal number of chromosomes. The duplicated chromosomes contain extra copies of hundreds or thousands of genes. Certain combinations of aneuploid chromosomes throw the cellular machinery into chaos and thus lead to cancerous growth. As a result of aneuploidy, the total DNA content of a cancer cell can rise to more than twice or fall to nearly half that of a normal diploid cell. In 2007, Scientific American published an article Chromosomal Chaos and Cancer by Duesberg. Each cancer is unique. Even if cancers are from the same tissue, and are generated with the same carcinogen, they are never the same. There is always a cytogenetic and a biochemical individuality in every cancer. The Ferromagnetic Theory of Cancer (Theory from The Old Testament): any human cell should be interpreted as a society of dia-, para-, superpara-, ferri- and ferromagnetic nanoparticles. These nanoparticles have certain local magnetic contacts. Any human organism consists of normal cells (cells with non-numerous superpara-, ferri- and ferromagnetic nanoparticles) and tumor cells (cells with numerous superpara-, ferri- and ferromagnetic nanoparticles). Intracellular molecules FeO;Fe2O3;Fe3O4 are the main creators of intracellular superpara-, ferri- and ferromagnetic nanoparticles that can chaotically distort DNA and shift chromosomes (by local magnetic fields). Shift chromosomes means confuse, displace, interlace, invert, mix, muddle, permute, remove, transfer or/and transpose chromosomes / chromosomal fragments. Cancer is a subtle iron disease (hemochromatosis is an obvious iron disease). Oncologists must beat tumors, large metastases and micro-metastases by non-complicated anti-iron methods of The Old Testament.