[ 3^6 ] 
Nctwithdanding I have treated of pulfation on 
tumors, and a difcoloration of the integuments or 
coverings of the part, when they do exid, as being 
the trued: marks of aneurifms ; yet it mud not be 
inferred from what has hitherto been advanced, 
that the appearances of thefe fymptoms are unexcep- 
tionable rules of tumors being aneurifmal ; feeing it 
does happen, that mere impodhumations, or collec- 
tions of matter, arifing from external as well as from 
internal caufes, are fometimes fo immediately fituated 
upon the heart itfelf, and at other times upon fome 
of its principal arteries, as to partake in the mod 
regular manner of their contraction and dilatation 
(fydole and diadole). 
Some years ago I faw an indance of a boy, about 
13 years of age, who had his bread-bone much 
broken by a fall. On this acccount he was admitted 
into Guy’s Hofpital 5 but not till a fortnight after the 
accident happened. 
Upon examination, there appeared an evident fe- 
paration of the broken parts of the bone, which were 
removed at a confiderable didance from each other : 
the intermediate fpace was occupied by a tumor of 
u confiderable dze : the integuments were of their 
natural complexion : the tumor had as regular a 
contraction and dilatation as the heart itfelf, or the 
aorta could be fuppofed to have. 
Upon predure, the tumor receded ; upon a re- 
moval of the predure, the tumor immediately re- 
fumed its former fize and fhape. All thefe are the 
-didinguhhing dgns of a true recent aneurifm. The 
iituation and fymptoms of this fwelling were judged 
Sufficient reafons for confidering the nature of the 
difeafe 
