Malignant
Cancerous — able to invade surrounding tissue and spread elsewhere.
What it means
Cancerous. A malignant growth can invade the tissue around it and can spread to other parts of the body.
What the word does not tell you is almost everything that matters:
- The stage — how far it has gone, which is the main determinant of outlook
- The grade — how aggressive the cells look
- The type — which varies enormously in behaviour and treatment
- Whether it is curable, which many malignancies are
"Malignant" and "terminal" are not the same word, and they are frequently conflated at the moment of reading a letter.
In practice
On histology reports and in clinic letters, sometimes read before anyone has had the chance to explain it — which is increasingly common now that results appear in patient apps.
"Suspicious for malignancy" is different again, and means the appearance is concerning but not confirmed.
Why it matters
If you have read this in an app before speaking to anyone, contact the team. Do not spend a weekend interpreting a histology report alone — it is not written for you and the words carry weight they do not deserve out of context.
The questions that matter are: what type, what stage, and what is the plan. Write them down before the appointment
Take someone with you, and ask for the plan in writing. Very little is retained from that conversation, which is normal and expected.
Clinically reviewed by Dr Mohammad Zubair Khan, GMC 7563469
Last reviewed
August 30, 2026