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COMPUTERIZED TOMOGRAPHY OF MALIGNANT MELANOMAS OF THE CHOROID
Author(s) -
ALSBIRK K. E.,
HALABURT H.
Publication year - 1983
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1983.tb01496.x
Subject(s) - choroid , medicine , choroidal melanoma , retinal detachment , ophthalmology , melanoma , contrast (vision) , contrast enhancement , retinal , nuclear medicine , radiology , retina , physics , cancer research , magnetic resonance imaging , optics , artificial intelligence , computer science
Twelve histologically verified choroidal melanomas, 15 normal fellow eyes and 4 simulating lesions (vitreous haemorrhage, choroidal haemorrhage, retinal detachment and choroidal detachment) were CT‐scanned before and after intravenous contrast media (maximal attenuation in the tumours were estimated from a computerized curve corresponding to a line placed from the center of the eye, through the tumour to the outside of the bulb). The melanomas showed significantly higher precontrast attenuation (54 HU) than the control eyes (17 HU) measured in symmetrical points. Enhancement was registrated in all the tumours (mean = 22 HU, P <0.01), but not in the control eyes. Among the simulating lesions, the retinal detachment enhanced after contrast. Indications for CT‐scan of intraocular processes are diagnostic doubt in opaque media and suspected extrabulbar extension. A patient with verified, disciform organised subretinal haemorrhage scanned after the primary series showed contrast enhancement comparable to the malignant melanoma series. Also ‘CT‐positive’ tumour eyes have to be observed over a period.