mesothelioma

Mesothelioma is a cancer that grows from the thin lining cells of the pleura itself, rather than spreading in from elsewhere. Instead of forming one neat lump, it tends to creep along the pleural surface, gradually wrapping and encasing the lung like a thickening rind that squeezes it down.

Its defining feature is its link to asbestos. Inhaled asbestos fibers can lodge in the pleura and, decades later, trigger this malignancy; the lag between exposure and disease is often thirty to forty years, which is why cases still appear long after asbestos use has been curtailed. Typical features are a persistent pleural effusion, breathlessness and chest-wall pain that worsens as the tumor advances.

Diagnosis usually needs tissue, not just fluid, because the cells can be hard to tell from benign reactive changes — so a pleural biopsy, often by thoracoscopy, is central. Mesothelioma is generally aggressive and hard to cure; care combines treatments aimed at the cancer with steps to control fluid, breathlessness and pain. Honest prognosis and symptom relief are an important part of management.