Also found in: Medical.


1. Of or relating to the energy of light.
2. Enhancing the effects of or inducing a toxic reaction to light, especially to ultraviolet light.

pho′to·dy·nam′i·cal·ly adv.


1. (General Physics) of or concerned with photodynamics
2. (General Physics) involving or producing an adverse or toxic reaction to light, esp ultraviolet light
3. (Medicine) med denoting a therapy for cancer in which a cytotoxic drug is activated by a laser beam
References in periodicals archive ?
Photocure ASA, a specialty pharmaceutical company focused on photodynamic technologies in dermatology and cancer, is pleased to announce that the National Institute for Health and Care Excellence (NICE) in the UK has published its first guidelines on bladder cancer, recommending photodynamic diagnosis for improved detection of bladder cancer.
The aim of the study was to investigate the effect of photodynamic therapy in the presence of gold nanoparticles coupled with protoporiphyin on the life of cervical cancer cells.
LOS ANGELES -- An investigational type of photodynamic therapy appears promising for treating early cervical intraepithelial neoplasia, finds a phase 2b trial reported at the annual meeting of the Society of Gynecologic Oncology.
a bio-pharmaceutical technology company developing and manufacturing novel therapies for oncology and rare diseases announced today the acquisition of laser technologies for use in photodynamic therapy (PDT).
Release date- 18072011 - Oslo, Norway - Photocure ASA (OSE: PHO), a specialty pharmaceutical company focused on photodynamic technologies in cancer and dermatology, has initiated enrolment in a large phase II trial in USA to confirm the safety and efficacy of Visonac.
Photodynamic therapy (PDT) is a method of treating malignant tumors based on the photodynamic damage of tumor cells resulting from a photochemical reaction.
MONACO, April 29, 2010 /PRNewswire/ -- At the 10th Congress of the European Society for Photodynamic Therapy (Euro PDT), held in Monaco on March 12-13, 2010, Professor Lasse Braathen (Tromso, Norway), president of the Euro PDT, described the current state of topical photodynamic therapy, a revolutionary treatment for precancerous skin lesions and superficial skin carcinomas.
Ondine Biopharma's Photodynamic Disinfection Technology Clinical Data
Elsevier (Philadelphia, PA) has begun the publication of two new journals, including Alzheimer's & Dementia: The Journal of the Alzheimer's Association and Photodiagnosis & Photodynamic Therapy.
The agreement covers photodynamic therapy and diagnostics, and, at the end of the three-year period, PhotoCure has the right to extend the agreement for a further two years.
She reported on a trial from Johns Hopkins University that randomized 57 patients with inoperable esophageal cancer to stenting or photodynamic therapy Both techniques improved dysphagia; neither had any advantage regarding overall survival--about 4 months for both groups.
The idea of using ordinary visible light and a harmless drug to treat cancer and other diseases may sound a bit far-fetched, but it is now an established treatment in many hospitals, and it is known as photodynamic therapy.