PSA, Tumor Marker, Grand Itasca


Sunquest Code:GHPSA  
Epic Code:LAB7047Epic Name:Prostatic Specific Antigen GH
Synonyms:PSA Screen; Prostate 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) (Red (no gel))
Contraindications:Large doses of biotin (10 mg or more per day) may cause clinically significant interference in prolactin 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  (Grand Itasca GICH)


Interpretive

Reference Range:Less than 3.1 mg/mL
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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