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Queen's English for tumor, see there.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.


1. Any swelling or tumefaction.
2. Synonym(s): neoplasm, tumour.
3. One of the four signs of inflammation (tumor, calor, dolor, rubor) enunciated by Celsus.
Synonym(s): tumour.
[L. tumor, a swelling]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


A swelling. The term usually refers to any mass of cells resulting from abnormal degree of multiplication. Tumours may be BENIGN or MALIGNANT. Benign tumours enlarge locally, and are often enclosed in capsules, but do not invade tissue or spread remotely. Malignant tumours infiltrate locally and also seed off into lymphatic vessels and the bloodstream to establish secondary growths (metastases) elsewhere in the body.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005


a swelling, usually a morbid growth.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005


(tū'mŏr) Avoid the jargonistic use of this word as a synonym of neoplasm.
1. Any swelling or tumefaction.
2. One of the four signs of inflammation (the others are, calor, dolor, rubor) enunciated by Celsus.
Synonym(s): tumour.
[L. tumor, a swelling]
Medical Dictionary for the Dental Professions © Farlex 2012

Patient discussion about tumour

Q. What is a brain tumor?

A. A brain tumour is any intracranial tumor normally either in the brain itself in the cranial nerves, in the brain envelopes, skull, pituitary and pineal gland, or spread from cancers primarily located in other organs (metastatic tumors). It is created by abnormal and uncontrolled cell division. Primary (true) brain tumors (which start in the brain) are commonly located in the posterior cranial fossa in children and in the anterior two-thirds of the cerebral hemispheres in adults, although they can affect any part of the brain.

Q. Is this a tumor? I felt a lump in my breast a few days ago in the shower. Is this a Tumor? Help! I'm scared.

A. If you felt a lump in your breast then you should go see your Doctor to check whether or not it is something that could be dangerous.

Q. what is carcinoid tumors? I had my appendix removed and the doctor came in the room very shocked and said it was full of carcinoid tumors. Im scared to get them somewhere else.

A. ya I have pain all the time but the doctors wont give me anything cuz im so young they don't want me hooked on anything. thank you sooo much for being so kind.

More discussions about tumour
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References in periodicals archive ?
Our study included 394 patients with a clinical and radiological diagnosis of CNS tumours. Patients included 260 males (66%) and 134 females (34%).
21 had right sided tumours, 15 had left and 6 had bilateral tumours.
Ovarian tumours: anatomohistopathological contribution to their interpretation.
Like other studies, serous epithelial tumour was the commonest benign tumor and serous carcinoma was the commonest malignant tumor in this study.
This study was planned at a tertiary care hospital over a time period of nine years, from 2007 to 2016, all the cases of ovarian tumours diagnosed in the histopathology department were retrieved.
Factors predicting local recurrence of desmoid tumours including proliferating cell nuclear antigen.
Malignant neuroectodermal tumour of the chest wall (Askin tumour): CT and MR findings in eight patients.
Gamma knife surgery in acoustic tumours. Acta Neurochir Suppl (Wien) 1993;58:104-7.
Clinical dose-response curves of human malignant epithelial tumours. Br J Radiol 1973;46:1-12.
Cartilaginous tumours of the larynx, J Laryngol Otol 1987;l0l:266-75.
On the location of malignant metastases with special regard to the behaviour of the primary malignant tumours of the lung.