Primary Umbilical Endometriosis: Unusual Clinical Presentation with microscopic diagnosis.

INTRODUCTION: Endometriosis, commonly occurs in the pelvic organs, mostly the ovaries, with dysmenorrhea, menorrhagia Umbilical endometriosis is rare .Symptoms include umbilical masses with swelling and pain.. SO it is often not recognized  based on  its clinical appearance. PRESENTATION OF CASE: A 32-year old female, was presented  with  umbilical bulging and  mild cyclic umblical  pain. without  history of abdominal surgery ,  or symptom of pelvic endometriosis . Umbilical sonography was  infavour of fixed sac of herniation , underwent surgery , umbilical  endometriosis accidentally  found in  pathologic examination  after surgery for umbilical hernia. CONCLUSION: Although endometriosis is a common gynecological disease, primary umbilical endometriosis is a rare entity  that make the diagnosis is difficult. Nevertheless, It was impossible to establish a definitive diagnosis of umbilical endometriosis only  by   clinical data, . And  this disease must be considered   in the differential diagnosis of  any  suspected  umbilical swelling