Neoplasm

A neoplasm is an abnormal growth of tissue caused by cells that divide and grow when they should not. Neoplasms can be benign (not cancerous, do not spread) or malignant (cancerous, able to invade nearby tissue and spread to other parts of the body). The word is often used in pathology reports as a more precise alternative to "tumor."

Origin

From the Greek neo (new) and plasma (formation or growth). The term entered medical use in the 19th century as pathologists, especially Rudolf Virchow, developed cellular theories of disease and needed a precise word for newly formed abnormal tissue.

Significance in Asbestos Context

Most asbestos-related cancers (including pleural and peritoneal mesothelioma, lung cancer, laryngeal cancer, and ovarian cancer) are described in pathology reports as malignant neoplasms. The exact wording used by the pathologist matters: terms like "malignant neoplasm of the pleura" or "malignant mesothelial neoplasm" appear in records that your medical and legal teams will rely on to confirm diagnosis, stage the disease, and link it to asbestos exposure. Benign asbestos-related findings (such as pleural plaques) are not neoplasms, and distinguishing benign from malignant findings is central to both your treatment plan and any claim.

Example Sentence

The biopsy report described a "malignant neoplasm of mesothelial origin," which the oncologist explained meant pleural mesothelioma caused by his decades of asbestos exposure as a pipefitter.

Related Terms

Mesothelioma, Malignancy, Tumor, Carcinoma, Pathology Report, Biopsy

Notes

• Request a full copy of every pathology report; the exact diagnostic wording ("malignant neoplasm," cell type, immunohistochemistry results) will be needed by both your treating physicians and your legal team.
• Ask your doctor to clarify whether any finding labeled a "neoplasm" is benign or malignant. The distinction changes treatment, prognosis, and claim eligibility.
• If a report uses uncertain language like "neoplasm of uncertain behavior," ask whether additional testing (immunostains, second-opinion review at a mesothelioma specialty center) is recommended before treatment decisions are made.
• Preserve all imaging, biopsy slides, and tissue blocks; these may be needed for expert review if your diagnosis is later contested.