Around 1910 (date) - My grandfather went to Mayo

My grandfather was a physician back then - and had a lump sticking out of neck near throat. Of course - those were known to "do anything" - (my mother once read the Merck Manual and thought she had cancer but it was just a pimple inside her nose). They removed the lump, found it was a thyroid nodule, and - back then there were no medications for any thyroid problems - but Mayo knew about and placed him on a beef derived (read cows extra parts from slaughter house) thyroid preparation. I have had thyroid problems (runs in families at times) - so I found it fascinating. I wrote Mayo Clinic a few years ago and they had records (legally in Texas adult medical records only. have to be kept ten years) - a typed two sentence report on his resected lump. I found "my grandfather's story" fascinating - went to a medical library - and found that "way back" - "before lab tests" - doctors used behavioral traits to make diagnosis - from my mother's recollections - his behavior fit the "typical hypothyroid personality". Medicine has a strange history - forty years ago most people with "fatigue" got a B12 shot. If you read about diagnosis of B12 problems today - in a big thick book with a big thick chapter on it - you sometimes wonder why they (and also know why) they do not do this now. "Tip of ice burg" sort of thing -