hyperphenylalaninemia

[hī′pər-fĕn′əl-ălə-nə-nēmē-ə, -fē′nəl-]

n.

Abnormally high blood levels of phenylalanine, possibly associated with elevated tyrosine levels, seen especially in newborns.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.