Pathology

Pathology is the branch of medicine that diagnoses disease by examining tissues, cells, and body fluids under a microscope and with specialized laboratory tests. A pathologist is the physician who issues the report that confirms what disease is present, what subtype it is, and often what likely caused it.

Origin

From the Greek pathos (suffering, disease) and logos (study). Modern pathology emerged in the 19th century with Rudolf Virchow's cellular pathology, which established that disease could be understood by examining cells and tissues directly.

Significance in Asbestos Context

The pathology report is usually the single most important document in an asbestos-related disease case. It establishes the specific diagnosis (for example, epithelioid mesothelioma versus a lung adenocarcinoma that has spread to the pleura) and that distinction can determine prognosis, treatment, and whether a claim is viable. Pathologists confirm mesothelioma using a panel of immunohistochemical stains (such as calretinin, WT-1, and BAP1) and may quantify asbestos bodies or fibers in lung tissue to document past exposure. Defendants frequently challenge the diagnosis itself, so a clear, well-supported pathology report from an experienced thoracic or mesothelioma pathologist can be decisive.

Example Sentence

Her oncologist sent the pleural biopsy slides to a mesothelioma pathology expert for a second opinion before finalizing the treatment plan and the legal claim.

Related Terms

Biopsy, Histology, Immunohistochemistry, Mesothelioma, Asbestos Bodies, Fiber Burden Analysis

Notes

• Request a copy of the full pathology report (not just the summary) and ask whether the diagnosis was confirmed with immunohistochemical stains; this matters for both treatment and any claim.
• For suspected mesothelioma, ask whether the slides and tissue blocks can be sent for a second opinion to a recognized mesothelioma pathology center such as the U.S.–Canadian Mesothelioma Reference Panel.
• Preserve all pathology materials (slides, paraffin blocks, and reports) because they may be needed years later for expert review, additional staining, or fiber analysis.
• If a biopsy is being planned, ask the surgeon to obtain enough tissue for both diagnosis and possible molecular or fiber-burden testing later.