Tumour

A tumour is an abnormal growth of tissue, it may also be known as neoplasm. Tumours can either be benign or malignant. 

Benign tumours 

Benign tumours are not cancerous tumours and do not invade surrounding tissue. Despite not being cancerous they can be harmful if they are pressing on blood vessels or nerves. 

Malignant Tumours 

Malignant tumours are cancerous tumours. These tumours metastasise and invade surrounding tissue. One key feature of malignant tumours is that they divide uncontrollably.