ABSTRACT
Objective: To discuss the diagnostic value of the new 5-sector approach for orbital imaging division in the diagnosis of orbital space-occupying lesions. Methods: We retrospectively analyzed the clinical and imaging data of 374 patients with orbital space-occupying lesions. The distribution of the lesions was analyzed according to the new 5-sector approach for orbital imaging division (globe compartment, optic nerve compartment, intraconal compartment, extraconal compartment and extra-periosteum compartment) and the distribution rule of the lesions were discussed. Results: Hemangioma was the most common lesion among our group, with an incidence of 34.75%(130/374); 79.23% (103/130) of the hemangiomas were distributed in the intraconal compartment. There was a distributional difference between the lymphoma and inflammatory pseudotumor(χ 2 = 13. 63, P=0.001), with the former mainly located in the extraconal compartment and the latter often in the mixed compartments. We also found that there were distributional differences for those lesions which had more than 10 sufferers in our study(χ2= 788.058, P=0.001). Significant differences were also noted in the distribution of both benign and malignant lesions in the intraconal, extraconal and mixed type compartment(χintra/extra2=66.53, P extraconal compartment (56.12%,78/139)> mixed type(36.96%, 17/46); for the malignant lesions, the incidence order was: mixed type(63. 04%,29/46)> extraconal compartment(43.88%,61/139)> intraconal compartment(0.82%,1/122). Conclusion: There are distributional differences in orbital space-occupying lesions under the new 5-sector approach for orbital imaging division, indicating that the new 5-sector approach is helpful in the diagnosis of orbital lesions.
