Appendicitis pain 5 days, er gave me ultrasound and blood tests. said no sign of appendicitis. pain continues. positive mcburney. appendicitis likely?

Common appy imitator: In general, the new CT scanners are very good at picking up appendicitis. There is another fairly common condition called mesenteric adenitis which present almost exactly like appendicitis but it's usually due to a virus and resolve on its own. Again, in general, if your lab work is normal and the CAT scan is normal appendicitis extremely unlikely