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Can dogs detect malignant tumors in humans?

As you know, dogs smell much better than humans. Their long use in the detection of explosives and drugs. There is reason to believe that dogs are able to tell by the smell and malignant tumors, but today this is no sufficient scientific basis.

Recently, the media reported that the dog breed Siberian husky named Sierra helped discover ovarian cancer her mistress, the 52-year-old American Stephanie of Hertel. According to women, this is the third such case.

The first time it happened in 2013. Sierra, which came to her in 2011 at the age of 9 months, sniffed her belly and began to show signs of anxiety, and then huddled in a corner of the toilet.

She put my nose on the abdomen and unghiului so much that I thought I spilled something on myself clothes. Then the dog began to sniff it a second and third time. After the third time Sierra ran away and hid!, – says the dog’s owner.

Stephanie visited the doctor, was diagnosed with ovarian cancer stage 3. Since then, the cancer recurred twice, and the Sierra every time, showed signs of anxiety, forcing her mistress to pass the diagnostics. In the same way the dog reacted and the other hostess, who then also was diagnosed with cancer.

The first report on the ability of dogs was published in 1989 when the dog is fidgety after sniffing the affected area of the thigh women. After the medical examination, the woman was diagnosed with melanoma.

It is assumed that cancer cells have a certain smell, but weak enough for the human nose could perceive. For many years, conducted various experiments in which the biological samples were placed in front of the dogs to check whether they can choose a malignant sample.

Despite the fact that in laboratory conditions were obtained encouraging results, yet certain problems arise when dogs are trying to verify the ability to smell cancer in real situations.

When the dog sniffs and correctly identifies the sample that contains cancer cells, the dog than the reward for development and reinforcement of the desired skill. However, in the real world it is impossible to immediately know whether the dog identified cancer patient. On this edition of Popular Science said Dr. Claus Hackner (Klaus Hackner), who studied the cancer detection dogs at the University of Krems (University of Krems) in Austria.

Although such cases are known, as Sierra and her owner, but dogs are not machines, they can be wrong, but it is not possible to use them to detect cancer. The dog may miss a really sick cancer patient to detect cancer in a healthy person.

So, in review on this topic in 2012, Dr. Peter Lipson (Peter Lipson) wrote: I have no doubt in the social and emotional value of dogs as companions and assistants. But other than that, it would be evidence.