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Smooth muscle actin (clone 1A4) pin

IHC

Smooth muscle actin (clone 1A4)

Methodology: IHC

Clinical Significance:
Identifies: Leiomyomas, leiomyosarcomas, and mesenchymal tumors manifesting myofibroblastic differentiation (where the antibody often displays a 'tram track' appearance). Subcellular Localization: Cytoplasmic (filamentous)

Organ:

Disease State: Spindle Cell Tumors / Sarcoma Subtyping

CPT Code(s): 88342 or 88341 (reference only; CPTs may vary)

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