Mouse immunohistochemistry

A laboratory applies a mouse-derived primary antibody to thin sections of preserved tissue. If the target protein is present, the antibody binds to it. A detection system then creates a coloured or otherwise visible signal under a microscope. The pathologist studies where the signal appears, how strong it is, and which cells contain it.

The result can support the identification of a tumour type, distinguish similar-looking conditions, or reveal markers that affect treatment planning. It is interpreted with the tissue architecture, biopsy findings and clinical information. A positive stain does not automatically mean cancer, and a negative stain does not by itself exclude every diagnosis.

Ask which marker was tested and why it was selected. Request an explanation of whether the finding is supportive, indeterminate or inconsistent with the suspected diagnosis. The laboratory may use a panel of stains, controls and additional tests when one marker is not enough. Keep the pathology report with your other medical records and ask how it connects with the biopsy and imaging.

Immunohistochemistry itself is performed on tissue already collected, so it normally does not cause new symptoms. Seek care for problems from the biopsy, such as persistent bleeding, spreading redness, drainage, fever, worsening pain or increasing swelling. Contact the clinician who arranged the test if the report is delayed or uses terms you cannot interpret.

Which protein or marker was tested? What does the staining pattern show in my sample? Were comparison stains or controls used? Does this result change the diagnosis or treatment plan? Is another biopsy or laboratory test needed? When will the complete pathology interpretation be available?