GREG'S LEGACY

Specialising in the human experience of Living with prostate cancer – warts and all

Cancer Detection Using A Dogs Sense Of Smell

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A dogs Tail

A dogs Tail

I recently read an interesting article that has prompted me to present the information here for my readers. At the latest annual meeting of the American Urological Association a presentation was given by a group of Italian researches on the results of a study in the use of dogs to identify prostate cancer. The link to this article appears among other links at the end of this post.

As a young man I spent three years in the Australian army, two years as a member of a unique unit establishing a mine dog section to support our troops in Vietnam. Mine warfare on jungle trails and bunker systems had become a whole new ball-game for our defence forces needing new methods to counter the devices being used. This unit was formed in 1971 and was due to be deployed to Vietnam in November 1972. The new Australian Government however announced the withdrawal of our troops in August 1972, so the unit never deployed to Vietnam. The mine dog section of 1972 however evolved over the years into the modern era, where our soldiers depend on the use of what are now known as explosive detection dogs. Our current forces with these dogs have served with distinction in Iraq and Afghanistan.

I can recall how amazed I was when time after time these dogs were able to locate explosive targets in all sorts of hidden positions, either buried or concealed in unbelievable locations. The size of the charges did not seem to effect the results, from large caches to microscopic residue found in a car boot. My admiration for a dog’s nose grew larger as we became involved with the early training of the custom drug dog training team. Two custom officers joined us for a period of time and together we successfully re-trained two of our mine dogs to locate drugs of all types. They of course went on to build the current drug detection units we see today.

So it was no surprise to me when I read the presentation and results on the study of dogs detecting prostate cancer at the AUA annual meeting. Further reading by me had me asking myself why this type of research has taken so long to be recognised and more widely promoted. I can only hope it will lead to a safer non evasive method of detecting cancer of all types for patients.

The following information may be of value in understanding what the results of the study could lead to in cancer detection. There are 220 million olfactory cells in a canine nose, compared with 50 million for humans. When dogs are trained to sniff for a target, they are detecting the chemicals emitted by the target. These chemicals are microscopic and are referred to as volatile organic compounds, or VOC’s. The particular VOC’s emitted by explosives and drugs have been identified and hence electronic sniffers for these compounds are now in use as can be witnessed at airports.

It is the same for the detection of cancer. Specific microscopic VOC’s have been found in the breath of lung cancer patients and colon cancer patients, as well as in the urine of prostate cancer patients. The most recent findings have spurred increased interest in dog cancer detection research, including efforts to determine the identity of the VOC’s emitted by different types of cancer. This would assist in the development of electronic devices that can mimic the accuracy of a dog’s sense of smell in detecting cancer in humans.

Now to the study results referred to at the beginning of my article. Two German Shepherds called Liu and Zoey (Ex Explosive Detection Dogs) were able to detect the presence of prostate cancer with an accuracy of 98.1 percent among more than 800 samples tested. These included samples from men with very low-risk disease, men with metastatic disease, healthy males, healthy females, and patients with non-neoplastic diseases or non-prostatic tumors. The dogs were able to detect low-risk and more advanced prostate cancers with equal facility.

In other areas Dina Zaphiris, a recognized dog trainer in America who works with canines on federally funded studies in detecting early cancer in humans. In 2009, Zaphiris, a dog trainer for 25 years founded the In Situ Foundation, a nonprofit organization that trains cancer detection dogs and conducts research in the field. In her studies, patients exhale through a tube on to a cloth, which captures molecules, or VOCs, of a malignancy. Trained dogs then sniff the cloths for cancer presence.

A Cause Worth Supporting

A Cause Worth Supporting

This information seems to back up the cliché that a dog is truly a mans best friend. The possibilities opening up with this work may be life changing in the early detection of cancer.

Lee aka Popeye.

Further Reading

http://prostatecancerinfolink.net/2014/05/21/liu-and-zoey-are-ferraris-who-massively-outperform-psa-testing/#more-19712

http://www.dogsdetectcancer.org/

 

http://www.chicagotribune.com/news/sns-wp-blm-news-bc-cancer-dogs24-20140524,0,4294267.story

 

 

 

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Written by Lee

24 June 2014 at 11:42 pm

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