Preoperative imaging to predict orbital invasion by tumor
| Autor: | M D, Eisen, D M, Yousem, L A, Loevner, E R, Thaler, W B, Bilker, A N, Goldberg |
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| Rok vydání: | 2000 |
| Předmět: |
Male
Intraoperative Care Lacrimal Apparatus Diseases Nose Neoplasms Image Enhancement Magnetic Resonance Imaging Sensitivity and Specificity Radiographic Image Enhancement Adipose Tissue Oculomotor Muscles Predictive Value of Tests Risk Factors Preoperative Care Humans Orbital Neoplasms Female Neoplasm Invasiveness Tomography X-Ray Computed Forecasting Retrospective Studies |
| Zdroj: | Headneck. 22(5) |
| ISSN: | 1043-3074 |
| Popis: | Our purpose was to examine the accuracy of preoperative imaging in assessing tumor invasion of the orbit and nasolacrimal system.Nineteen preoperative CT and 17 preoperative MR images from patients at risk for orbital invasion were retrospectively reviewed. Invasion was corroborated by pathologic and intraoperative assessment.Tumor adjacent to the periorbita was the most sensitive predictor of orbital invasion (90%) for both CT and MRI. Extraocular muscle involvement on MRI (100%) and orbital fat obliteration (80% MRI, 86% CT) had the highest positive predictive values of the criteria evaluated. Extraocular muscle displacement and enhancement were less accurate (65%) predictors. No one criterion was79% accurate in predicting orbital invasion. Six or more positive criteria predicted invasion with 67% sensitivity and 80% specificity (accuracy, 72%). CT was more accurate than MRI in seven of nine criteria. Invasion of the nasolacrimal system was predicted accurately (89%).Although preoperative imaging can aid in surgical planning, it should not replace intraoperative assessment in ambiguous cases of orbital invasion. |
| Databáze: | OpenAIRE |
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