This is a retrospective review of 105 patients with keratocystic odontogenic tumours treated over a 23-year period with a mean follow up of 86 months. The recurrence rate was 11.4%. Permanent neuro-sensory deficit of the inferior alveolar nerve 16%. Younger age, multilocularity, larger size and longer AP dimension of the cyst were found to be risk factors for recurrence. This is a useful review paper in the run-up to exit exams but outwith this has little new to add.