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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 ?
A: Most of the tumors are equally represented in men and woman except for those tumors which come from areas specific to men or women.
The other half of brain tumors, referred to as primary brain tumors, arise from structures within the brain.
Conclusion: Among the histomorphologic variants of ovarian tumors, benign tumors are more common than malignant ones for all age groups.
Spectrum of pediatric brain tumors in India: a multi-institutional study.
The salivary gland tumors have limited documented epidemiology as in many studies the data is restricted to parotid gland or tumors of major salivary glands.
Right-sided tumors of ovary, 134 cases (55.37%), were more common than the left-sided tumors, 94 cases (38.84%).
The researchers injected these nanoparticles into mice that had been implanted with human-breast tumors. After gathering inside tumors, the particles clumped and blocked about 20 percent of each tumor's blood vessels.
(1,12,14) Large tumors with anterior and inferior extension approaching the clivus and jugular foramen, respectively, typically require an extended transcochlear approach, including facial nerve transposition.
For 34 cysts with <5 cm diameter, the tumors were ablated completely, with no recurrence after 3 months.
This early detection and treatment system for tumors, according to Kobayashi, has yielded promising results.
Recent data from both hematologic malignancies and solid tumors have suggested that there are only minor populations of cells in each malignancy that are capable of tumor initiation.
(11,13) Patients with low CD4 T cells are more likely to develop treatment-refractory immunoblastic lymphomas expressing the anti-apoptosis protein Bcl-2, whereas patients with higher CD4 T cells are more likely to develop treatment-sensitive Burkitt's or centroblastic tumors. (14) Since HAART there has been a relative decrease in the occurrence of the inmmnoblastic tumors, with the more favorable Burkitt's and centroblastic tumors representing a relatively larger proportion of lymphomas.