The moon's orbit is elliptical so if you happen to get a solar eclipse just as the moon's distance is changing from a little bit smaller than the Sun to a little bit larger than the Sun, what you can get is an eclipse path that begins as annular and ends up total, or vice versa.
My last colonoscopy they did an endoscopy at the same time. If you're already sedated, and the Dr thinks that there's reason to do an endoscopy, seems like a good idea to do both at the same time. Crohn's Disease for 22 years. Diagnosed in Feb 1989 at age 14. Resection surgery schedule for first week in June.
1 Confirmation: endoscopy can be used to complete biopsies (removal of a small section of tissue) to confirm a diagnosis of cancer or other diseases.  Treatment: an endoscope can be used to directly treat an illness; for instance, endoscopy can be used to cauterize a bleeding vessel or remove a polyp.