Primary Umbilical Endometriosis (Villar’s Nodule): A Rare Symptomatic Umbilical Pathology in An Adult Woman. Khwaja Yunus Ali Medical College Journal [Internet]. 2022 Jun. 5 [cited 2026 Jul. 1];13(1):56-60. Available from: https://www.banglajol.info/index.php/KYAMCJ/article/view/59883