I read an article about phototesting in PLE (BJD 2005 153, 1234) by Prof. Schornagel from Utrecht, Netherlands. Authors conclude that

  • Optimum number of exposures for phototesting is 4
  • Oberving skin reactions for a few days after discontinuation of phototesting can be informative.

Phototesting was +ve in 38 out of 40 suspected cases of PLE. When I was in Manipal, India as a post graduate, we have not succeeded in demonstrating even a single +ve response on phototesting! What could be the reason? Bad technique or dark Indian skin?

Bell Eapen
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About Bell Eapen 247 Articles
Techie Dermatologist, Information Systems PhD, Supporter of Open-Source Software, Machine Learning and AI geek, loves cricket, Canadian wine and beer. [Resume]

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