%A M Sengupta %A A Naskar %A S Gon %A B Majumdar %J Online Journal of Health and Allied Sciences %T Villar?s Nodule %X Villar?s Nodule or primary umbilical endometrioma is a rare condition, with an estimated incidence of 0.5 to 1% of all patients with endometrial ectopia. Several aetiological theories have been proposed for its pathogenesis with coelomic metaplasia being the favoured one and also, umbilicus may acts as a physiological scar with a predilection for endometrial tissue in the development of spontaneous umbilical endometriosis. Since endometriosis remains a diagnostic and therapeutic enigma even today, largely due to its variable presentations, we, hereby report a case of primary umbilical endometrioma due to its rarity and unusual presentation. %N 1 %K Umbilical; Endometriosis %E Dr Srinivas Kakkilaya %V 10 %D 2011 %I BS Kakkilaya %L cogprints7832