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V. L. Torres, P. B. Bordon, N. Allemann; Imaging of Ocular Surface Tumors: High Frequency Ultrasound and Anterior Segment Optical Coherence Tomography. Invest. Ophthalmol. Vis. Sci. 2009;50(13):6212.
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To compare ultrasound biomicroscopy and anterior optical coherence tomography for evaluating ocular surface tumors.
Prospective case series included corneal and/or conjunctival ocular tumors. All patients were submitted to photographic documentation, UBM (50 MHz transducer, immersion technique) and AS-OCT (1320 nm, VisanteTM OCT, Carl Zeiss Meditec, Inc) examination. Histopathologic correlation was possible in the lesions submitted to biopsy.
Fifteen patients were studied (males, 8). The following lesions were evaluated: conjunctival intraepithelial neoplasia (2); conjunctival cyst (1); invasive squamous cell carcinoma (4); conjunctival nevus (2); conjunctival melanoma (2); epibulbar dermoid (2); granuloma (1); primary acquired melanosis (1). AS-OCT was useful for evaluating flat solid lesions (less than 1.0-mm thick) despite pigmentation. Conjunctival cystic lesions were well-delimited, independent of its thickness. UBM was also adequate to image such lesions, and was superior to determine the posterior boundary of thick and/or pigmented lesions. Lesions containing a heavy amount of keratin or calcium deposits could not generate adequate image using both methods.
High-frequency ultrasound is indicated in a wide range of ocular surface tumors, due to its property to penetrate thick and pigmented lesions. For certain surface tumors, AS-OCT can be useful for serial analysis, considering that it is a well tolerated non-contact method. Lesions with either a heavy amount of keratin or calcium provided suboptimal documentation with both methods, due to artifacts.
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