Endometriosis is defined as endometrial glands and stroma in and extra-uterine site and affecting 6%-10% of women in
reproductive age. Appendiceal endometriosis is very rare condition with prevalence around 2.8% of women with endometriosis.
In symptomatic cases it can simulate acute appendicitis. This report presents the 20-years-old female patient with right lower
abdominal pain associated with anorexia, vomiting and nausea. The symptoms, physical examination and abdominopelvic
ultrasound suggested to acute appendicitis. We did laparoscopic exploration and appendectomy. Diagnostic confirmation of
appendiceal endometriosis was performed after histopathological analysis. We demonstrated that it would be crucial to consider
appendiceal endometriosis in the differential diagnosis for right lower quadrant abdominal pain.