PSA, Tumor Marker


Sunquest Code:PSA  
Epic Code:LAB3695Epic Name:PSA Tumor Marker
Synonyms:PSA Screen; Prostatic Specific Antigen
Methodology:Chemiluminescence
CPT Code:84153
Turnaround Time:Varies by site.


Collection Instructions

Specimen:Blood
Optimal Volume:2.5 mL
Minimum\Peds Volume:0.6 mL
Container:Red or gold (gel) (Green (lithium heparin, gel), Green (lithium heparin) on ICE, Red (no gel))
Contraindications:Large doses of biotin (10 mg or more per day) may cause clinically significant interference in PSA tumor marker levels. If interference is suspected, it is strongly recommended that biotin is discontinued for at least one week prior to retesting.


Processing and Shipping

Specimen Processing:Centrifuge and aliquot within 4 hours of collection 1.25 mL, 0.2 mL minimum. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature. Alternatively, ship on dry ice.
Test Performed at or Referral Lab Chemistry  (University of Minnesota Health Maple Grove Clinics, Fairview Range - FRMC, UMMC-East Bank, Oxboro Bloom, Fairview Lakes - FLMC, Fairview Northland - FNMC, M Health Clinic and Surgery Center)


Interpretive

Reference Range:0-4 ug/L
Use:Elevated in many patients with prostate cancer, as well as in some patients with prostatic hypertrophy. Primarily used to track progression of prostatic carcinoma, monitor therapeutic response, and identify recurrence of disease. Half life is approximately 2 days.


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