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Pain relieving, anti-inflammatory 'cold laser' causes increased skin tumour growth, says a new study.
Jan M. Bjordal from Bergen University College, Norway, worked with a team of Brazilian researchers to carry out experiments in the lab and in living organisms.
"High irradiances (radiation) of low-level laser therapy (LLLT) has gained increasing popularity as a treatment for soft tissue injuries and joint conditions," said Bjordal.
However, there is a shortage of evidence, especially in living organisms, about the effects of LLLT in malignant conditions such as melanoma.
LLLT was pioneered in the 1970s, when it was discovered that light from low-intensity lasers causes cells to proliferate more rapidly, said a Bergen release.
It is marketed as a treatment for hair-loss, pain management, sports medicine and skin care -- among many other things. Home-treatment sets are available online for unsupervised use.
Bjordal and his colleagues applied LLLT to cancer cultures and to mice injected with melanoma cells.
Although the treatment did not cause any significant changes in the cell cultures, direct irradiation of the tumour with high-dose LLLT caused a significant increase in tumour size and considerable alterations, indicating a worsening of the cancer, in the mice.
These findings were published in the open access journal, BMC Cancer.
Last updated on Nov 20th, 2009 at 16:46 pm IST--IANS
The United Arab Emirates (UAE) and Turkmenistan have signed bilateral agreements for cooperation in various fields, WAM news agency reported Tuesday.
Hollywood actress Drew Barrymore is making plans to bring back the hit TV series "Charlie's Angels" back to the small screen.
Toyota Motor said Tuesday it would recall about 437,000 vehicles globally to fix a faulty braking system in its top-selling Prius and three other hybrid models, the latest in a series of recalls threatening the reputation of the world's largest carmaker.
A Somali minister Tuesday said government forces had killed a senior Al Qaeda fighter who was also a member of Somali insurgent group al-Shabaab.
Iran Tuesday started the 20-percent uranium enrichment process, the head of the country's Atomic Energy Organization said.
One-rank-one-pension demand accepted: Antony
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