Breast cancer spreads with shifts
April 16th, 2008 Guage
Spreads with shifts
With the minority several kind of category tumor, for example the thyroid cancer is similar, breast cancer’s natural course is very usually long, the mammary gland cancer cell’s doubling time is 90 days equally, becomes malignant from the first cell starts to calculate, passes through 30 multiplies many times, the lump body can achieve the diameter is the lcm spheroid, this takes time 7 ~ 8 year long time. Breast cancer’s cause of disease not yet completely understands, cuts the mortality rate the best method is the early time discovered that early treatment. Before the tumor has the shift, uses the surgery and the radiotherapy only may cure the overwhelming majority case. Once has the shift, the active treatment also can only cure the young partial patients, therefore understanding breast cancer’s natural law. Is helpful treats breast cancer’s best plan in the choice.
Breast cancer’s expansion may to periphery, be possible to pass through the lymph directly and the blood stream. The lymph node should be reasonably prevents the cancer cell from the primary tumor the leisurely first barrier, the cancer cell, if can pass on the method accumulative offense collar bone through the lymph node barrier the lymph node, then the invasion vein enters the blood. The tumor except shifts outside the armpit lymph node, but may also implicate the parasternal lymph node, many for second and the three, four intercostals, tumor located at breast in half and areola zone time change so, from here cancer then accumulative offense mediastinum lymph node. The mammary gland cancer cell may also invade the blood vessel to cause the distant place shift directly. The intercostal collateral branch may the vein enters through the chest gallery in after the side innominate vein enter the pulmonary circulation. The mammary gland depth portion organization, the musculus pectoralis and the thoracic wall vein converges the armpit vein, enters the subclavian vein and the innominate vein, is the important way which the lung shifts, the intercostal vein flows to the azygos vein and half azygos vein, finally enters the lung after on venae cavae, the azygos vein system may through the intervertebral vein, zhui outside vein Cong Houzu with zhui in the vein be connected, zhui the vein is and the venae cavae blood stream when the intra-abdominal pressure change may flow mutually, therefore, some patients before has not presented the venae cavae is (for example lung) shifts, presents shifts first and so on skull, spinal column, pelvis.
Since long, the people then discovered breast cancer when seeing a doctor then may have the distant place shift, although on clinical was still unable to examine, this constituted the execution conservative chemotherapy rationale. Today has been able according to the tumor size, to exhaust oneself the lymph node number as well as the other many kinds of biological features preliminary estimate distant place small shift stove existence degree of hazard.
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