Dako immunohistochemistry explained

Dako is a laboratory brand associated with antibodies, reagents, instruments, and testing workflows. Immunohistochemistry is the method: a pathology laboratory applies antibodies to a prepared tissue sample so particular proteins can be visualised under a microscope.

A pathologist selects a panel of stains according to the tissue appearance and the clinical question. The pattern may help clarify what type of cells are present, where a tumour may have started, or whether a marker relevant to treatment is detected. A positive or negative stain is interpreted alongside cell shape, tissue structure, sample quality, medical history, imaging, and other laboratory findings.

The brand name alone does not describe the result. The meaningful details are the marker tested, the staining pattern, any scoring method, the pathologist’s interpretation, and whether the sample was adequate. Different markers answer different questions, so one stain rarely explains an entire diagnosis.

Ask for the pathology report and review it with the clinician managing your care. Identify which tissue was tested, which markers were ordered, what each result contributes, and whether further stains or molecular tests are pending. Do not interpret a marker in isolation or change treatment based only on a word such as positive.

If the report is uncertain, the care team may request deeper tissue sections, another stain, review by a specialist pathologist, or additional tissue. That does not necessarily mean the sample was handled incorrectly; some diagnoses require several pieces of information to reach a clinically useful conclusion.

Immunohistochemistry is performed on tissue outside the body, so the staining itself does not cause symptoms. Any immediate health concerns are more likely to relate to the procedure used to collect the sample. Follow the biopsy team’s instructions and promptly report increasing swelling, worsening pain, fever, spreading redness, drainage, or bleeding that does not settle. Seek emergency care for severe breathing difficulty, fainting, or heavy bleeding.

Ask: Which markers were tested and why? Did the staining clarify the diagnosis or tumour origin? Is the result used to select treatment, and does it need confirmation? Was the tissue adequate? Are more results still pending? Would review by a pathologist who specialises in this tissue type change the next step?