In the setting of pelvic disorders, before the introduction of MRI defecography, conventional fluoroscopic defecography was the gold standard. Compared to this latter, MRI defecography has the advantage of providing a full pelvic study, enabling the diagnosis of any coexisting diseases (i.e. oncological or inflammatory ones) that could be missed on conventional fluoroscopic defecography. We present an incidental diagnosis of pseudomyxoma peritonei causing a peritoneocele detected at MRI defecogr
