monosymptomatic

[ mŏn′ō-sĭm′tə-mătĭk, -sĭmp′- ]

adj.

Of or being a disease or pathological condition manifested by only one marked symptom.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.