What is the difference between a tumour and cancer?

A tumour is an abnormal mass of tissue. Cancer is a disease characterized by malignant tumours that can invade nearby tissue and spread (metastasize). All cancers involve tumours, but not all tumours are cancerous (benign tumours are not cancer).

Is 'tumor' the correct spelling?

'Tumor' is the standard American English spelling. 'Tumour' is the standard British English spelling. Both are correct within their respective varieties.

Can you feel a tumour?

Some tumours, especially those near the surface of the skin or in soft tissue, can be felt as a lump. Many internal tumours, however, are only detected through medical imaging like X-rays or MRIs.

What does 'benign tumour' mean?

A benign tumour is a non-cancerous growth. It does not invade nearby tissue or spread to other parts of the body. It can still cause problems if it presses on vital organs, but it is not life-threatening in the same way a malignant tumour is.

tumour

UK/ˈtjuːmə(r)/US/ˈtuːmər/

Medical, formal, and general. The term is widely understood but belongs to a specialist domain. Can be used in everyday conversation, often with sensitive connotation.

My Flashcards

Definition

Meaning

An abnormal mass of tissue that forms when cells grow and divide more than they should or do not die when they should.

Used metaphorically to describe any undesirable, growing entity within a system that consumes resources or causes dysfunction.

Linguistics

Semantic Notes

Central concept in oncology. Implies abnormal, uncontrolled growth. Not all tumours are cancerous; the term encompasses both benign and malignant growths.

Dialectal Variation

British vs American Usage

Differences

Spelling: UK 'tumour', US 'tumor'. The pronunciation difference is minimal, relating to the vowel in the second syllable.

Connotations

Identical. Both denote the same medical condition with the same serious implications.

Frequency

Equally frequent in their respective varieties within medical and general discourse.

Vocabulary

Collocations

strong

benign tumourmalignant tumourbrain tumourremove a tumourtumour growth

medium

primary tumouraggressive tumourtumour cellsdiagnose a tumourtumour size

weak

dangerous tumourdiscovered a tumourfight the tumourworried about the tumour

Grammar

Valency Patterns

have a + tumourdiagnose a + tumour + in + [body part]operate on a + tumoura tumour + that + clause

Vocabulary

Synonyms

Strong

cancer (only if malignant)carcinoma (specific type, technical)malignancy (if malignant)

Neutral

growthmassneoplasm (highly technical)lesion (contextual)

Weak

lump (informal, non-specific)swelling (can be non-neoplastic)

Vocabulary

Antonyms

healthy tissuenormal cell growth

Phrases

Idioms & Phrases

“Time bomb (metaphor for a malignant tumour)”
“A shadow on the scan (referring to a newly discovered tumour)”

Usage

Context Usage

Business

Metaphorically used: 'The toxic division was a tumour on the company's culture.'

Academic

Standard term in medical and biological research papers: 'The study analysed tumour microenvironment in murine models.'

Everyday

Used with care, often in personal health contexts: 'The scans showed the tumour had shrunk.'

Technical

Precise descriptor in clinical settings: 'The resection margins were clear of tumour involvement.'

Examples

By Part of Speech

verb

British English

N/A (rarely used as a verb). The process is 'tumourigenesis'.

American English

N/A (rarely used as a verb). The process is 'tumorigenesis'.

adverb

British English

American English

adjective

British English

tumourous (less common)
tumour-associated
tumour-bearing

American English

tumorous (less common)
tumor-associated
tumor-bearing

Examples

By CEFR Level

The doctor found a small tumour.

She had surgery to remove a benign tumour from her arm.

The biopsy confirmed that the tumour was malignant, requiring immediate treatment.

Advanced imaging techniques allow for the precise mapping of the tumour's vascular network prior to resection.

Learning

Memory Aids

Mnemonic

Think of 'TUM' growing in 'OUR' body – a TUMOUR is an unwanted growth in us.

Conceptual Metaphor

A PARASITE (consumes resources, lives off the host); A WEED (uncontrolled, invasive growth).

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

Avoid direct calque 'опухоль' for all contexts – in English, 'swelling' is not a perfect synonym. Use 'tumour' for a neoplastic growth.
The Russian term 'рак' translates specifically to 'cancer' (a malignant tumour), not to 'tumour' in general.

Common Mistakes

Incorrect spelling (tumour vs. tumor) for the wrong variety.
Using 'tumour' and 'cancer' interchangeably (a tumour can be benign).

Practice

Quiz

Fill in the gap

The scans were positive; they revealed a small near the liver.

Multiple Choice

Which of the following statements is accurate?

FAQ

Frequently Asked Questions

: A tumour is an abnormal mass of tissue. Cancer is a disease characterized by malignant tumours that can invade nearby tissue and spread (metastasize). All cancers involve tumours, but not all tumours are cancerous (benign tumours are not cancer).
: 'Tumor' is the standard American English spelling. 'Tumour' is the standard British English spelling. Both are correct within their respective varieties.
: Some tumours, especially those near the surface of the skin or in soft tissue, can be felt as a lump. Many internal tumours, however, are only detected through medical imaging like X-rays or MRIs.
: A benign tumour is a non-cancerous growth. It does not invade nearby tissue or spread to other parts of the body. It can still cause problems if it presses on vital organs, but it is not life-threatening in the same way a malignant tumour is.