These channels have lymph nodes along their path that all ultimately drain into the blood stream. The body recognizes this and provides necessary components of the immune system to fight it. The anatomy of the breast can be compared to a bunch of grapes, where the main stem branches into a series of smaller stems that terminate with a grape. They do, however, help us understand breast cancer on the molecular level and with time could enhance the diagnosis and treatment of breast cancer References 1 Birdwell, Robyn L. Because this spongy tissue is difficult to compress, masses are more difficult to see. Mayo Clinic Health Information. The arteries and veins supply and drain blood, respectively, while the nerves provide sensory and motor functions.
They do, however, help us understand breast cancer on the molecular level and with time could enhance the diagnosis and treatment of breast cancer References 1 Birdwell, Robyn L. Choosing Your Breast Cancer Specialist and Treatment Plan Anatomy of the Breast If you asked most women what kinds of tissue are in their breasts, they probably could not tell you, except that they make milk for nursing a child. These molecular subtypes are not being used as part of standard medical practice at this time, but are for research purposes only. A Sophisticated Structure The breast lays directly on top of your pectoralis major and minor muscles, which make up your chest wall and separate the breast from the ribcage. It may be contained within a duct DCIS , invade through the walls of the duct and into surrounding tissue, or begin in a lobule and invade into surrounding tissue. A lobule produces milk toward the end of a pregnancy, and the milk is carried within this series of ducts to the nipple, where suckling from a baby allows its release. Two major subtypes are luminal and basilar, which can be further classified as luminal A, luminal B or basilar. Invasive breast cancer begins as a contained group of cells that continue to divide uncontrollably, disregarding the normal signal to stop dividing. The breast is also composed of veins, arteries and nerves that tend to run together and are surrounded by fatty tissue that holds them in place. These channels have lymph nodes along their path that all ultimately drain into the blood stream. Because this spongy tissue is difficult to compress, masses are more difficult to see. As they divide, they form masses of cancer cells called tumors that grow into and destroy normal tissue. The body recognizes this and provides necessary components of the immune system to fight it. The lymphatic channels drain the site of the cancer and carry cancer cells into lymph nodes. This is true even in the breast, which makes them easier to compress and provides for a better mammogram image. The majority of the breast is fatty tissue and connective tissue that hold the other components in place. Fatty tissue is less dense and appears darker on mammogram. The breast has scattered lymph nodes in the tissue itself, but cancer typically drains to the clusters of lymph nodes that can be found in the axilla, or armpit. There are two types of genes that are known to be involved in cancer development. If infection or cancer is present, the lymph nodes that drain that site may be enlarged and firm. The stems are similar to the system of ducts in the breast and the grape resembles a lobule. As you age, your tissues lose their elasticity. Mayo Clinic Health Information. The arteries and veins supply and drain blood, respectively, while the nerves provide sensory and motor functions. Breast cancer often contains deposits of calcium that appear bright white on mammogram. When a lot of connective tissue is present, the breast appears to be a faint white color with scattered densities on mammogram.
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