J Korean Radiol Soc.  1990 Apr;26(2):311-321. 10.3348/jkrs.1990.26.2.311.

Computed tomography of orbital space-occupying lesions

• Park CG
• Jeong KW
• Park CH
• Kim JC
• Cho JS
• Rhee BC

• KMID: 2358947
• DOI: http://doi.org/10.3348/jkrs.1990.26.2.311

Abstract

CT examinations of orbit have attained a preeminent position as a noninvasive safe technique for theevaluation of many orbital problems because intraorbital fat with inherent low density provides a natural contrastto all soft tissue structures within the orbits, normal or abnormal. In our study, radiologica analysis was madeon CT fidings of 40 cases pathologically proven orbital space-occupying lesion during the 3 years from 1986 to1988. The results were as follows: 1. The incidence of orbital lesions based on location was common in extraconalarea(15 cases), followed by intraocular (12 cases), extraorbital (8 cases), intraconal (4 cases), and musclecone(1 case). 2. The incidence of orbital tumors was most common in retinoblastoma(8 cases), followed bypseudotumor (6 cases), and hemangioma(3 cases). 3. Choroidal melanoma & hemangioma occured in elderly andretinoblastoma, teratoma, endodermal sinus tumor occured in young children. 4. Retinoblastoma combined withcalcification in 88% and extraocular extension in 2 cases. 5. In the differential diagnosis, indivisualcharacteristics are useful in teratoma, epidermoid cyst, hemangioma and retinoblastoma. And locatins of thelesions are useful in lacrimal gland tumor, epidermord cyst and hemangioma. Intravenous contrast media is veryuseful in detection of vascular tumors, pseudotumors and their extent. 6. Indivisual characteristic lesions & relations to the adjacent structures were well analyzed by thin slice section and reconstruction of data fromaxial scanning into coronal, and sagittal planes. 7. Exact tumor detection & localization were possible in allcases. Therefore, CT scaning is useful method in differentiating orbital lesions & its extent.

MeSH Terms

Aged
Child
Choroid
Contrast Media
Diagnosis, Differential
Endodermal Sinus Tumor
Epidermal Cyst
Hemangioma
Humans
Incidence
Lacrimal Apparatus
Melanoma
Methods
Orbit*
Retinoblastoma
Teratoma
Contrast Media