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Micrometastases – Melanoma/Carcinoma in Lymph Node

Evaluation of micrometastasis (less than 2 mm) in carcinoma and melanoma.

CPT Codes:

88342 (units may vary depending on the number of antibodies tested)


Specimen Requirements:
  1. Fixed Paraffin Block with Corresponding H&E:
    • Tissue should be well-fixed in formalin. If alternative fixative is used, it should be noted on the requisition.
    • 0.2 cm x 0.2 cm x 0.2 cm tissue.
    • Store specimen at room temperature (20-23.5°C).
    • Use cold pack for transport. Be sure cold pack is not in direct contact with specimen during transport.
  2. Unstained Slides:
    • Send all slides within 6 weeks of cutting.
    • Minimum of 4 slides per antibody per level according to protocol.
    • Precut slides from paraffin blocks in 5 micron sections.
    • Mount on Poly-L-Lysine-coated or plus (+) slides. Mounting specimens on “capillary gap” slides is preferable for IHC.
    • Air dry. Do not oven dry.
    • Store specimen at room temperature (20-23.5°C).

Turnaround Time:

2-3 days


Client Services: Oncology/Pathology   800-447-5816

Specimen Services/Pickup:  877-246-1226