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Lab Test Dictionary

Sterols, Plasma (STER)


Gas Chromatography-Mass Spectrometry (GC-MS)


Campesterol; Desmosterol; Desmosterolosis; Lathosterol; Phytosterolemia; Phytosterols; Sitosterol; Sitosterolemia; Tendinous Xanthomatosis

Specimen Type


Performing Lab

Mayo Medical Lab

Epic ID

Other Reference Test

Lab Test Days

Monday, Wednesday, Friday

Standard TAT

3-9 Days

Collection Information

Specimen Required

1 mL Blood

Container Type

Dark Green (Sodium Heparin)

Collection Instructions

Plasma collected in an EDTA (lavender-top) or ACD Solution A/B (yellow-top) tube is also acceptable.

Processing Information - Lab Use Only

Transport Temperature


Specimen Stability

Room Temp: Unacceptable; Refrigerated: 90 Days; Frozen: 90 Days (Preferred)

Test Volume Required

0.5 mL Plasma

Minimum Test Volume

0.2 mL Plasma

Included Tests

Desmosterol, Lathosterol, Campesterol, Sitosterol and Cholestanol.

CPT Codes