Step 1: Characteristics of Malignant Cells
Malignant cancer cells exhibit the following properties:
- Uncontrolled and continuous cell division.
- Resistance to apoptosis (programmed cell death).
- Cellular immortality (absence of replicative senescence).
- Induction of angiogenesis to facilitate rapid growth via blood supply.
Step 2: Identifying the Incorrect Option
Because malignant cells stimulate angiogenesis, the option describing "inhibition of angiogenesis" is incorrect.
Final Answer:
\[
\boxed{\text{inhibition of angiogenesis}}
\]