Weird pronunciations in medicine

- pathology - obviously pronounced puh-thology (in IPA /pə 'θɑ lə dʒij/) But all I ever hear when docs say it is path-ology (IPA /'pæθ 'ɑ lə dʒij/), the first syllable not unstressed sounding like 'path'. Since everything in life must have a reason, I wonder what it is. Is it an attempt to differentiate it from something that sounds similar? Do they just want to emphasize it somehow?

- patent - obviously pronounced pa-tent (in IPA /'pæ tent/). Like patent attorney, patent leather shoes, patently false. But docs use it to refer to, say, a vessel or duct or that is not collapsed, that is full of liquid or air keeping it mostly cylindrical-ish, never mushed or squeezed down (blocked or occluded or limp). And when they do so, they say pay-tent (IPA /'pej tent/)

There are others. Doctors are weird.