We are proud to announce that PhenoPath is now a Quest Diagnostics Company.

GFAP (glial-fibrillary acidic protein) pin


GFAP (glial-fibrillary acidic protein)

Methodology: IHC

Clinical Significance:
Identifies: Glial fibrillary acidic protein (GFAP), an intermediate filament protein expressed almost exclusively in glial cells and tumors of the central nervous system. GFAP is also expressed, however, in a restricted subset of epithelial tumors, including salivary gland pleomorphic adenomas. Subcellular Localization: Cytoplasmic

Organ: Brain/CNS

Disease State:

CPT Code(s): 88342 or 88341. The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

Turnaround Time: Within 1-2 business days of receipt

Schedule: Monday - Friday

Specimen Requirements:
• Formalin-fixed, paraffin-embedded (FFPE) tissue block or cell block - OR - • 1 unstained slide for each test requested plus 3-4 additional unstained slides cut at 4µm