I am a medical doctor, who surgically removes an arrow out of your colon and puts it in the biohazard container.
a more formal word for doctor -(you wouldn't say "I need to see the 医師!" - you'd say, "I need to see the 医者（いしゃ）！”）
-ology ★☆☆☆☆ SUF
a SUFFIX meaning, 'XXX branch of medicine -' in other words, 'XXXology'.
medical treatment- the kind one gets in a hospital (x-rays, MRI, surgery, etc.)