?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Villar%E2%80%99s+Nodule&rft.creator=Sengupta%2C+M&rft.creator=Naskar%2C+A&rft.creator=Gon%2C+S&rft.creator=Majumdar%2C+B&rft.subject=Online+Journal+of+Health+and+Allied+Sciences&rft.description=Villar%E2%80%99s+Nodule+or+primary+umbilical+endometrioma+is+a+rare+condition%2C+with+an+estimated+incidence+of+0.5+to+1%25+of+all+patients+with+endometrial+ectopia.+Several+aetiological+theories+have+been+proposed+for+its+pathogenesis+with+coelomic+metaplasia+being+the+favoured+one+and+also%2C+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%2C+largely+due+to+its+variable+presentations%2C+we%2C+hereby+report+a+case+of+primary+umbilical+endometrioma+due+to+its+rarity+and+unusual+presentation.&rft.publisher=BS+Kakkilaya&rft.contributor=Kakkilaya%2C+Dr+Srinivas&rft.date=2011-04-15&rft.type=Journal+(On-line%2FUnpaginated)&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F7832%2F1%2F2011-1-19.pdf&rft.identifier=++Sengupta%2C+M+and+Naskar%2C+A+and+Gon%2C+S+and+Majumdar%2C+B++(2011)+Villar%E2%80%99s+Nodule.++%5BJournal+(On-line%2FUnpaginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F7832%2F