- When we talk about lumps, growths or tumours we are usually talking about neoplasia.
- A neoplasm is a bunch of cells that forms a lump or tumour, and it is the result of uncontrolled growth of cells.
- This may be due to a mutation or a lack of programmed cell death (apoptosis).
- A neoplastic mass is also called a tumour and it may be
- benign (link to What is a benign tumour?) or
- malignant (link to What is cancer? And Why is malignant neoplasia called cancer?)