Galen says an imposthume is the same as a swelling according to the ancients346 and nescoid in Gaelic is the same as apostema in Latin; apostema is the same as a tumour after leaving its natural disposition. {Dicitur enim apostema a post & tumor .i. posterius tumor .i. tumor superveniens post dispositionem naturalem.}’’
[R. A. 943.]
And therefore it is called tumour, so that it might not be thought that the superfluous fat the body takes to itself because of nourishment of food and drink is imposthume.