How do you use lesion in a sentence?

1. The doctor found no sign of a lesion on the patient's brain.

2. The lesion took months to heal, and left a painful scar.

3. Scientists are studying the relationship between exposure to certain toxins and the development of lesions.

4. The lesion was benign and did not require surgery.

5. The lesion on his leg was a result of a car accident.