3D imaging of a right mandibular OKC in a 18-year-old female. (a) Before decompression protocol, the lesion spread from the swollen apex of the mandibular coronoid process to the centerline of the distal root of the first molar (major axis 55 mm). There was high risk of nerve injury because of an intimate relation of the cyst to the inferior alveolar nerve. (b) After 12 months of decompression, the OKC had significantly shrinken. (c) Enucleation did not harm the inferior alveolar nerve.