Navigation Links
Fluorescent probe for oral cancer
Date:8/4/2010

UC Davis researchers have developed a laser probe for the early detection of oral cancer. A trial with human subjects shows that the device could also be used during surgery to locate the edges of a tumor.

Approximately 43,000 people in the U.S. are diagnosed with tumors of the mouth, pharynx and larynx each year. The main risk factor is smoking, but a recent rise in cases has been linked to human papillomavirus. Most cases are not diagnosed until the cancer has reached an advanced stage.

"There's a lot out there about breast, prostate and brain cancer, but people are not so aware about oral cancer and its devastating consequences," said Laura Marcu, a professor of biomedical engineering at UC Davis. "People don't think to look for it, and there isn't any routine screening."

Marcu's laboratory collaborated with Dr. Gregory Farwell's group in the Department of Otolaryngology at the UC Davis Cancer Center to develop the fiber-optic probe.

The probe stimulates molecules in the patient's tissues with a laser. Some of these molecules naturally respond by re-emitting fluorescent light. The device rapidly detects and analyzes this light using a process called "time-resolved fluorescence spectroscopy" (TR-LIFS), which provides information about the types of molecules present.

During surgery, blood can distort the intensity of the fluorescence signal but not its duration. By using sensitive measurements of the change in fluorescence over time, surgeons can see the tumor margins even as they are cutting the tissue.

Based on encouraging results in animal tests, Marcu and Farwell's team recruited nine human volunteers from among patients who arrived at the UC Davis Medical Center for surgical therapy of the mouth, throat and larynx. They compared readings from spectroscopy with biopsy samples from the same locations and found that the probe could accurately diagnose the cancer in the surgical environment.

The probe is similar to one that Marcu has already developed for use with brain tumors. In clinical trials, surgeons have used her technology to delineate the margins of tumors during surgery.

Details of the human oral cancer study were published in the June issue of the journal Otolaryngology - Head and Neck Surgery. The pilot study in patients was supported in part by the Cancer Center and the Clinical and Translational Science Center at the UC Davis School of Medicine and the UC Davis Center for Biophotonics Science and Technology.


'/>"/>

Contact: Andy Fell
ahfell@ucdavis.edu
University of California - Davis - Health System
Source:Eurekalert

Related medicine news :

1. Replacing hydrogen in fluorescent dyes improves detection ability, stability and shelf life
2. Fluorescent probes light up cancerous tumors
3. Study Probes Causes of Anger in Returning U.S. Soldiers
4. PET scanning probes reveal different cell function within the immune system
5. Lab that probes genetic clues to disease is poised for major expansion
6. Nanoscale stealth probe slides into cell walls seamlessly, say Stanford engineers
7. Scientists develop the first model for investigating the origins of testicular cancer in humans
8. New imaging technique could help physicians ease the aftermath of breast cancer
9. Scientists develop designer protein, opening new door in cancer research
10. Oral contraceptive use associated with increased risk of breast cancer
11. Purdue-IU team uncovers potential prostate cancer marker
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/26/2017)... ... ... After raising nearly $30,000 on Kickstarter , about three-times its original campaign ... crowdfunding price on Indiegogo . , “Along with creating an anti-stress gadget to ... fidget toy to the market that was made of superior quality and wouldn’t break ...
(Date:5/26/2017)... ... , ... Silver Birch of Hammond, a new assisted lifestyle community, has welcomed ... of land at 5620 Sohl Avenue in Hammond, serves older adults who need some ... and one-bedroom apartments. Each of the private apartments at Silver Birch features a kitchenette, ...
(Date:5/26/2017)... ... May 26, 2017 , ... Dr. Alex Rabinovich, a highly-skilled oral ... new, informational blog post on insurance options. If a Bay Area patient has to ... save time and money. Visiting an in-network provider for a second opinion can ensure ...
(Date:5/26/2017)... ... ... to the Cross”: the personal journey of Bob Massey and his faith in the Lord. ... and Margaret Massey. Bob Massey is small in stature but big in character. ... love for others is apparent in all of his life decisions. , “I’m in ...
(Date:5/26/2017)... ... ... What Happened in the Garden of Eden”: retells the stories of three Bible figures in ... published author, Penelope Colt, mother, trader, horse farmer, artist and a former GM journeyman. ... At six, they moved to Dayton, Ohio, where Penny graduated high school. At ...
Breaking Medicine News(10 mins):
(Date:5/26/2017)... 25, 2017  In response to the opioid epidemic ... Relief is working with Pfizer to make up to ... cost to community health centers, free and charitable clinics, ... "Pfizer has a long-standing commitment to improving ... patient safety through educational activities," said Caroline Roan ...
(Date:5/23/2017)... Calif. , May 23, 2017  Leaf ... most innovative medical devices for pressure ulcer prevention, ... the American Association of Critical Care Nurses, National ... May 22-25. The Leaf Patient Monitoring ... specifically for the hospital environment.  The system seamlessly ...
(Date:5/22/2017)... 22, 2017  As the specialty pharmacy industry ... to make the revolutionary shift from volume-based to ... ensuring positive patient outcomes and shaping the future ... focus away from clinical trials and toward data ... specialty drug therapy utilization in precise patient populations. ...
Breaking Medicine Technology: