Quotation from: Manual of Surgery

Written by: Alexander Miles and Alexis Thomson


An aneurysm may prove _fatal_ by exerting pressure on important
structures, by causing syncope, by rupture, or from the occurrence of
suppuration. _Pressure_ symptoms are usually most serious from aneurysms
situated in the neck, thorax, or skull. Sudden fatal _syncope_ is not
infrequent in cases of aneurysm of the thoracic aorta.


_Rupture_ may take place through the skin, on a mucous or serous
surface, or into the cellular tissue. The first haemorrhage is often
slight and stops naturally, but it soon recurs, and is so profuse,
especially when the blood escapes externally, that it rapidly proves
fatal. When the bleeding takes place into the cellular tissue, the
aneurysm is said to become _diffused_, and the extravasated blood
spreads widely through the tissues, exerting great pressure on the
surrounding structures.

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