12 Tumours,Cysts ulcers sinuses
12.1 Tumours
12.2 Benign tumours
12.3 Malignant tumours
12.4 Benign to malignant transformation
12.5 Cysts
12.6 Ulcers
12.7 Sinuses and fistulas
12.8 Acknowledgement
12.9 Further reading