Table 2.

Laboratory parameters evaluated for the clinical assessment of the patient on admission at Toxicology Unit of IRCCS Salvatore Maugeri Foundation.

Parameters	Matrices	Value	Reference normal levels
Coproporphyrin I	Urine/24 h	7.65 microg/24 h	<25
Coproporphyrin III	Urine/24 h	59.3 microg/24 h	<75
Uroporphyrin	Urine/24 h	12.7 microg/24 h	<25
δ-Aminolevulinic Acid	Urine/24 h	2.1 mg/24 h	0.25–6.4
Porphobilinogen	Urine/24 h	1.22 mg/24 h	0.1–1.7
N-Acetyl-beta-D-glucosaminidase	Urine/24 h	5.14 IU/L	0.3–12
δ-Aminolevulinic acid dehydratase	Blood	75 U/mL	>20
Zinc protoporphyrin	Blood	67 microg/dL∗	<40

^∗Out of normal levels.