Ruptured desmoid tumor imitating acute appendicitis - a rare reason for an emergency surgery.

Background: Desmoid tumors, also known as aggressive fibromatosis, are extremely rare, accounting for less than 3% of soft-tissue sarcomas and less than 0,03% of all neoplasms. The diagnosis is usually delayed because of the lack of specific symptoms, and can sometimes lead to serious and, even fatal complications.

Case Presentation: We report the case of a 27-year-old male patient presenting with the clinical picture of acute appendicitis.