hydroa vacciniforme

[văk-sĭn′ə-fôrmē]
n.
  1. A hereditary recurrent eruption of bullae as a result of exposure to the sun that primarily affects male children or young men.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.