What should you know about frozen section immunohistochemistry?

A small tissue sample is quickly frozen, cut into thin sections, stained, and examined under a microscope. Immunohistochemistry adds selected laboratory markers that bind to proteins in cells. These patterns can help a pathologist distinguish tissue types or clarify whether a suspicious area has particular features. The result may guide an immediate surgical choice, but freezing can affect tissue quality and not every marker is suitable for rapid use. The later permanent-section report usually provides a fuller assessment.

Before surgery, ask which question the rapid test is intended to answer and whether its result could change the procedure. Afterward, ask when the final pathology report is expected and how the rapid finding will be reconciled with it. Keep the names of the tissue site, procedure, and pathology contacts together. If the report uses unfamiliar marker names, request an explanation in plain language rather than interpreting a single stain on its own.

The test itself does not determine whether a postoperative symptom is urgent. Contact the surgical team promptly for worsening pain, fever, increasing redness, fluid from the wound, wound separation, or swelling that affects breathing or swallowing. Seek emergency help for severe breathing difficulty, heavy bleeding, fainting, or sudden confusion. Follow the discharge instructions for wound care and medicines while waiting for the final report.

What was the rapid test looking for? Which markers were used? Could the result change the operation today? What information will the permanent sections add? When will the final report be reviewed with me?