A Case of Hyperammonemia Associated with High Dihydropyrimidine Dehydrogenase Activity

Table 2

Urinary analysis of dihydrouracil and uracil.

	Dihydrouracil	Uracil	Ratio
Patient’s value	5.325 µg/mL	0.495 µg/mL	10.75
Normal range [6]	1.7–13.1 µg/mL	4–30 µg/mL	0.3–0.77

Urinary DHU/U was much higher than normal. These findings supported the high activity of dihydropyrimidine dehydrogenase.