The spelling of the word "edeitis" or "aedceitis" may seem confusing, but it can be broken down using the International Phonetic Alphabet (IPA). The first three letters, "ed-" or "aed-", are pronounced with a short "e" sound followed by a "d" sound. The next syllable, "-eit-", is pronounced with a long "a" sound followed by a soft "t" sound. The final syllable, "-is" or "-itis", is pronounced with a long "i" sound followed by a "s" or "tis" sound. Despite the variation in spelling, the pronunciation remains the same.
Vulvitis; balanitis.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.