Appendicitis occurs when the appendix becomes blocked, often by stool, a foreign body, or cancer. Blockage may also occur from infection, since the appendix swells in response to any infection in the body.
A familial generation is a group of living beings constituting a single step in the line of descent from an ancestor. In developed nations the average familial generation length is in the high 20s and has even reached 30 years in some nations.
If the length of David's generation, Christ's generation, and the average life span of those living today in Israel is between 70 and 80 years (a 3000-year span), it would be reasonable to conclude that the generation Christ was talking about in the parable of the fig tree will also be 70 to 80 years in length.