The diagnosis of a smaller sized GOC is related to the attachment of only two teeth. While, a greater sized GOC develops over two teeth. Presentation of a greater sized lesion usually requires a biopsy for a differential diagnosis and a precise treatment plan.
A computed tomography and panoramic x-ray must be undertaken in order to observe the severity of internal complications. These scans allow for the observation of the GOC size, radiolucency, cortical bone, dentition, root, and vestibular zone. In some cases, the dentition may be embedded into the cavity walls of the lesion, depending on the position of expansion at the odontogenic tissue.