MYB immunohistochemistry: what should I know?

Immunohistochemistry uses antibodies to highlight a selected protein in cells from a tissue sample. MYB staining looks for MYB protein in the tumour cells and describes the staining pattern and intensity. A positive, negative, or unclear result is interpreted with the tumour’s appearance under the microscope, its location, symptoms, imaging, and other laboratory findings.

MYB expression can support a suspected tumour type, but it is not unique to one diagnosis and may vary between samples. A pathologist may recommend additional stains or molecular testing when the pattern does not give a clear answer.

Ask whether the MYB stain was requested to confirm a suspected diagnosis, separate similar tumours, or guide further testing. Request an explanation of the complete pathology report rather than reading one marker in isolation. If the sample was small or the result is limited, the team may discuss another Biopsy or review by a specialist pathologist. The result helps clinicians plan care; it does not determine treatment without the wider clinical picture.

Contact the treating team if the report uses terms you cannot interpret, if the diagnosis remains uncertain, or if the recommended follow-up is unclear. Seek urgent medical care for new severe pain, heavy bleeding from a biopsy site, fever with worsening redness or swelling, or breathing difficulty. These symptoms relate to immediate health needs and cannot be judged from MYB staining.

Why was MYB tested in my tissue? What did the cells look like, and how does the stain support or challenge the working diagnosis? Were other stains or tests performed? Is the sample adequate, and what happens if the result is inconclusive?