STUDY OF CAUSATION OR AETIOLOGY
The pathological deviations in various morbid conditions are but the pathognomonic symptoms manifested in the human diseased body and when they are rolled into one, they take a name and an image of a disease which is narrated in pathology. Therefore, the morbid changes or the disease could not, as a matter of fact, stand for causa morbi. As the cause is the background of a disease therefore a disease can not be a cause.