Word: bloodstreams
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...found that about 479,000 of the nation's 3.5 million or so Vietnam vets are afflicted with serious cases; an additional 350,000 display more moderate symptoms. PTSD is a state of extreme arousal caused by the virtual nonstop release of adrenaline and other similar substances into the bloodstream. When cars backfire, PTSD patients generally hit the dirt. The sound of helicopter rotor blades causes some to conceal themselves in trees. A baby's cry can invoke instant rage. Put in nonclinical terms, says psychiatrist Staten, the symptoms of PTSD are "like experiencing one's most threatening nightmares...
...also plays an unmistakable role in promoting the growth of tumor cells. Why do childlessness, late menopause, early onset of menstruation and delayed childbearing all increase the risk of breast cancer? One likely explanation is that all involve a prolonged, uninterrupted presence of high levels of estrogen in the bloodstream. Doctors have also noticed that women whose ovaries were removed before age 40 rarely get breast cancer...
Consider these facts. By the time a breast tumor is large enough to be felt as a lump, it is generally more than 1 cm (0.4 in.) in diameter and contains several billion cancer cells, some of which may have broken loose, circulated through the bloodstream and begun to infiltrate other organs. A mammogram can detect pinpoint tumors that are less than 0.5 cm (0.2 in.) across, often well before the process of metastasis has started. This is not to say that a manual exam by a doctor or the woman herself is a waste of time. Such exams...
...control pills. Norplant consists of six progestin-filled silicone tubes, each about the size of a matchstick. In a simple 15-minute procedure, a doctor inserts the tubes just beneath the skin in a woman's upper arm. Once in place, the tiny cylinders start releasing progestin into the bloodstream. The flow continues until the hormone is depleted -- usually in about five years. If a woman wishes to become pregnant earlier, she can have the tubes removed, and fertility will be restored in less than 48 hours. In clinical trials Norplant was remarkably effective. During the first two years...
Protoporphyria victims suffer from a defectiveenzyme, which causes the protoporphyrin moleculeto seep into the subject's skin rather thanincoporating itself into the oxygen-carryinghemoglobin in the bloodstream, where it belongs.At the body's surface, the errant molecule reactswith oxygen in the air, causing severe itching andburning...