Endometrioma of the Abdominal Wall after Caesarean Section

Background:Endometrial cell implantation after abdominal surgery, mainly after caesarean section, may result in formation of endometrioma, which is usually described to be of various sizes, and adjacent to the surgical scar. Case:A 36-year old woman complaining of a mass of the abdominal wall with pain during the menstrual period, with a caesarean section 5 years earlier, presented a rounded tumour not contiguous to the Pfannenstiel’s laparotomy scar, of hard consistence, fixed and adherent to the deep abdominal wall structures, located on the left paramedian epigastric region. Magnetic Resonance imaging showed the nodule, involving the deep layers of the abdominal wall and the distance from the laparotomic scar. Surgical removal was performed with wide excision of the lesion, causing a large wall defect. After histological con-firmation (endometriosis) by frozen section, reconstruction of the abdominal wall required prolene mesh grafting. After twelve months the patient is healthy. Conclusion: When abdominal wall endometrioma is located distant from the scar, perhaps more frequently after Pfannenstiel’s laparotomic inci-sion, the differential diagnosis may be more difficult and MRI can help diffe-rentiating many of these lesions, and histological confirmation should be ob-tained intraoperatively, by frozen section, to allow an oncological resection if required.