Tumour

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Neoplastic tumor of the cheek skin, here a benign neoplasm of the sweat glands called Hidradenoma.
Neoplastic tumor of the cheek skin, here a benign neoplasm of the sweat glands called Hidradenoma.
Look up tumor in Wiktionary, the free dictionary.
Main article: Cancer

A tumor or tumour is the name for a swelling or lesion formed by an abnormal growth of cells (termed neoplastic). Tumor is not synonymous with cancer. A tumor can be benign, pre-malignant or malignant, whereas cancer is by definition malignant.

Contents

Etymology

The term tumor is derived, via the Old French tumour, from the Latin tumor "swelling".[1] It originally meant an abnormal swelling of the flesh. In contemporary English, tumor is synonymous with solid neoplasm [2], all other forms of swelling being called swelling.[3] This usage is common also in medical literature, where the nouns tumefaction and tumescence, derived from the adjective tumefied, are the current medical terms for non-neoplastic swelling.[4]

Cause

Main articles: Cancer and Neoplasm

A neoplasm is an abnormal proliferation of tissues, usually caused by genetic mutations. Most neoplasms cause a tumor, with a few exceptions like leukemia or carcinoma in situ.

Tumors may be benign, pre-malignant or malignant (cancer). The nature of the tumor is determined by a pathologist after examination of the tumor tissues from a biopsy or a surgical excision specimen.

See also

References

  1. ^ t_22/12830354 at Dorland's Medical Dictionary
  2. ^ Tumor in MedlinePlus Medical Encyclopedia
  3. ^ swelling, in MedlinePlus Medical Encyclopedia
  4. ^ t_22/12830299 at Dorland's Medical Dictionary
v • d • e
Pathology: Cancer, Tumors, Neoplasms, and Oncology (C00-D48, 140-239)
Benign tumors
Malignant progression
Topography
Misc.

Wikipedia content modification information:

  • This page was last modified on 17 August 2008, at 22:39.

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