Oftalmol Zh.2009;1-2:19-24.

http://doi.org/10.31288/oftalmolzh2009121924

SELF-DESCRIPTIVENESS OF COMPUTER-TOMOGRAPHIC SIGNS FOR DIFFERENTIAL DIAGNOSIS OF TUMOURS OF THE LACRIMAL GLAND OF EPITHELIAL GENESIS

S. I. Polyakova

Odessa, Ukraine

The analysis was made of computer-tomographic semiology in 85 patients with tumours of the lacrimal gland of epithelial genesis (TLGEG). It is revealed that in 81.2 % of cases TLGEG are differentiated on the computer tomogram in the form of the soft tissue of nonhomogeneous structure. It is established that in malignant TLGEG oculomotor muscles and optic nerve are reliably more often affected and it is also determined distribution of a tumour to the cranial cavity, zygomatic area, accessory sinuses of the nose. It is determined that external and upper walls of the orbit in TLGEG are affected more often and practically equally frequently in different histologic types of the tumour, but in pleomorphic adenomas this affection is observed in the form of the thinned upper external walls of the orbit, and in malignant tumours — in the form of thinning and destruction.

According to the value of densimetric density (DD) of tumours there was developed a test of the preliminary estimate of malignancy of the tumoral process in the lacrimal gland — in DD value below 40 units of Haunsfield with probability of 88.2 % it is possible to diagnose malignant character of the tumour.

 

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