Getting a second opinion on biopsy slides

The reviewer may confirm the diagnosis, refine its classification, suggest further testing, or explain why the available material cannot settle a particular question.

Glass slides contain thin sections of preserved tissue. The laboratory may also hold a paraffin block, unstained sections, the original pathology report, and results from special stains or molecular tests.

A complete review compares the tissue with the clinical history and relevant imaging information. Digital pathology may allow authorised slide images to be assessed remotely, but the receiving centre decides whether digital files, physical slides, or blocks are acceptable.

Ask the receiving specialist which materials are required and whether their office will request them directly. Complete any release form, provide the original laboratory's contact details, and confirm how the items will be tracked and returned.

Keep copies of both reports and ask the treating clinician to reconcile any differences in plain language. Do not cancel or postpone time-sensitive care by yourself; ask the clinical teams whether treatment can wait while the review is completed.

Contact the treating team promptly if the slide transfer is delayed, material is reported missing, the two reports differ in a way that could change treatment, or you do not know which recommendation to follow.

A pathology review is not an emergency service. New heavy bleeding, breathing difficulty, sudden weakness, confusion, severe uncontrolled pain, or another rapidly worsening symptom needs urgent clinical assessment rather than waiting for the second report.

Ask whether the reviewer specialises in the relevant tumour type, whether the sample is adequate, which findings agree, and whether extra stains or a new biopsy are proposed. If the diagnoses differ, ask which interpretation will guide care and whether the case will be discussed jointly.