Uploaded January 2025 | Updated September 2026, 3 days ago

---

In this video, we look at benign and malignant tumours. First we look at benign tumours. We describe what is meant by a benign tumour and the features of benign tumours. We then look at what is meant by a malignant tumour and how malignant tumours are defined as cancers. We look at how malignant tumours can spread via metastasis and how malignant tumours can be treated by chemotherapy and radiotherapy.

Image credits:

Mitosis
commons.wikimedia.org/wiki/File:Mitosis_Mesenchymal_Stem_Cells.gif
Evilonan, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons

Malignant melanoma liver
commons.wikimedia.org/wiki/File:Malignant_Melanoma,_Liver_FNA,_Direct_Smear,_Pap_Stain_(8191269180).jpg
Ed Uthman from Houston, TX, USA, CC BY 2.0 creativecommons.org/licenses/by/2.0, via Wikimedia Commons

Malignant melanoma scalp
commons.wikimedia.org/wiki/File:Malignant_Melanoma_Mid_Frontal_Scalp.jpg
Dermanonymous, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons

Fibroma
commons.wikimedia.org/wiki/File:Fibroma.jpg
Klaus D. Peter, Wiehl, Germany, CC BY 3.0 DE creativecommons.org/licenses/by/3.0/de/deed.en, via Wikimedia Commons

Metastasis
Adapted by S. Donnelly from
commons.wikimedia.org/wiki/File:Figure_1_from_%27Targeting_Breast_Cancer_Metastasis_(20911418040).jpg
Libertas Academica from Auckland, New Zealand, CC BY 2.0 creativecommons.org/licenses/by/2.0, via Wikimedia Commons

Chemotherapy
commons.wikimedia.org/wiki/File:Chemotherapy_bottles_NCI.jpg
Unknown photographer/artist, National Cancer Institute, Public domain, via Wikimedia Commons

Radiotherapy
commons.wikimedia.org/wiki/File:Radiation_therapy_for_cancer.jpg
Jakembradford, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons