Encyclopedia

This test result is bad and could indicate an infection, especially viral. This is a great test for those with A1298C and especially who are Homozygous A1298C. Neopterin is bad while biopterin is good. If neopterin is repeatedly high, the BH4 is low. Neopterin is a sensitive marker of cellular mediated immunity. Reduced levels reflect cellular immunity weakening. Increased neopterin occur with infectious, inflammatory, immune system dysfunction or neoplastic disease evolution. Excessive neopterin negatively impacts the Nitric Oxide pathway in the body (e.g. excessive peroxynitrite formation an

Your lab may use its own range. Symptoms, medicines, and the types of white blood cells also matter.

Altitude, smoking, hydration, androgen therapy, and pregnancy may shift values.

Ask your clinician to consider altitude and iron/B12/folate status. Pregnancy requires trimester-specific ranges.

Hydration and altitude are major modifiers. Ask your clinician to review alongside hemoglobin and RBC indices.

Macrocytosis and microcytosis require cause-specific interpretation.

The test method matters. Ask your clinician to review with MCV and MCHC.

Analyzer-specific; hemolysis and cold agglutinins may interfere.

Useful with MCV for mixed nutrient deficiencies and evolving anemia.

Local analyzer range governs. Ask your clinician to review trends and collection artifacts.

Highly analyzer- and handling-specific. Ask your clinician to consider trend rather than isolated value.

Clinical action thresholds differ from statistical reference intervals.