And Constantine says on the eighth book of his Pantechnes, that apostema is the same as fatness or swelling, that a member suffers on account of excess of humours. And Galen says, regarding the fifth section Hippocrates wrote, that apostema is swelling and fatness beyond nature in bodies;352 therefore since unnatural swelling can be in every member, so also an imposthume can be in every member. And it is clear, according to Galen, that swelling in excess of nature can be in every member, for Avicenna says thus: every member that can be increased naturally by taking nourishment to itself, can be increased unnaturally and every member can be increased naturally by taking nourishment, because it is nourished; therefore it can also be increased unnaturally, (and) therefore, an imposthume can be in every member.353