Ophthalmic surgery / by Robert Brudenell Carter and William Adams Frost.

  • Robert Brudenell Carter
Date:
1887
Catalogue details

Licence: Public Domain Mark

Credit: Ophthalmic surgery / by Robert Brudenell Carter and William Adams Frost. Source: Wellcome Collection.

    531/582 (page 519)
    chap.xv.] Congenital Tumours. 5t5 walls of the orbit, and whether it is affected by move- ments of the eyeball; and, in the cases of 'soft or fluid swellings, whether they are affected by respira- tion, or if pulsation can be felt on making pressure YVnen there is any suspicion of a malignant growth the hard palate, nostrils, and posterior naves should be examined. Fluctuation can often be made out more easily if the globe be pressed back into the orbit ■ it, however, a layer of orbital fat lies over the tumour' a sensation may be given to the finger that is abso- lutely indistinguishable from the fluctuation of fluid Congenital tumours of the orbit are of pecu- liar interest and importance, because of the difficulty that occasionally arises in ascertaining whether tl ev are connected or not with the membranes of the brain lhey may be classified into three groups : (1) Cysts,' W nam, (3) meningoceles and encephaloceles. The neighbourhood of the orbit is a favourite seat ot the congenital subcutaneous or dermoid cysts Most commonly they are situated near the outer angle, just above the supraorbital ridge. In this situation they are usua ]y entirely external to the cavity of the orbit and their removal usually presents little or no •litticu ty. Occasionally, however, when nearer the orbit, their superficial appearance proves on dissection W l i ?7; SUC11 CySts W ^metimes been traced back far into the cavity; and occasionally found \T VeTV'tl fVlJei'ture ™ the roof has beeii found, through which the pulsations of the brain could be seen or felt * As a rule, however, the tumour can be distinctly isolated, and is easily removed. I he contents of dermoid cysts are very variable a circumstance which gave rise to a rather exten- sive nomenclature among the older authors. Most commonly they contain a substance resembling in ■^ssattHoimes in his ™k«