@misc{cogprints7832,
          volume = {10},
          number = {1},
           month = {April},
          author = {M Sengupta and A Naskar and S Gon and B Majumdar},
          editor = {Dr Srinivas Kakkilaya},
           title = {Villar?s Nodule},
       publisher = {BS Kakkilaya},
            year = {2011},
         journal = {Online Journal of Health and Allied Sciences},
        keywords = {Umbilical; Endometriosis},
             url = {http://cogprints.org/7832/},
        abstract = {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.}
}

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