What should you know about immunohistochemistry of lung cancer?

A pathologist examines the tissue’s structure and may add immunohistochemistry stains when routine appearance does not fully classify the tumour. Selected markers can support a distinction between different lung cancer categories or suggest that a tumour began elsewhere. Other markers may indicate whether additional molecular testing should be considered. The result is interpreted with scans, clinical history, and the quality and location of the biopsy. A stain cannot by itself describe every feature of a tumour or establish the full stage.

Ask for a copy of the pathology report and identify the specimen, markers, staining pattern, and final interpretation. Confirm whether the sample is sufficient for any further tests your team is considering, since a small biopsy may need careful allocation. Bring questions about how the findings affect classification and what information is still pending. A multidisciplinary team may combine pathology, radiology, and oncology opinions before recommending a plan.

Contact your oncology or respiratory team if results are unclear, testing is incomplete, or you are asked to provide another sample. Seek urgent help for severe shortness of breath, coughing up a large amount of blood, blue lips, or new confusion. These symptoms need attention because of their immediate effects on breathing, regardless of whether the pathology report is available.

What type of lung tumour does the tissue support? Which markers were tested and why? Is there enough tissue for molecular testing? What findings remain uncertain, and when will they be discussed?