Multidetector computerized tomography enema versus magnetic resonance enema in the diagnosis of rectosigmoid endometriosis

Ennio Biscaldi, Simone Ferrero, Umberto Leone Roberti Maggiore, Valentino Remorgida, Pier Luigi Venturini, Gian Andrea Rollandi

Research output: Contribution to journalArticlepeer-review


Purpose To compare the accuracy of multidetector computerized tomography enema (MDCT-e) and magnetic resonance enema (MRI-e) in determining the presence of sigmoid and rectal endometriotic nodules. Materials and methods 260 women (32.6 ± 4.3 years) with symptoms suggestive of rectosigmoid endometriosis underwent MDCT-e and MRI-e prior to laparoscopy. After retrograde colonic distention and injection of intravenous contrast medium, patients were scanned on a 64-row MDCT scanner. MRI-e was performed on a 1.5 T magnet using an 8 channels phased array coil; intestinal distention was achieved by introducing in the rectum 250-300 ml of ultrasonographic gel diluted with saline solution. Radiological findings were compared with surgical and histological results. Results 176 women had rectosigmoid endometriosis at surgery. There was no significant difference in the accuracy of MDCT-e (98.5%) and MRI-e (96.9%) in the diagnosis of sigmoid and rectal endometriosis (p = 0.248). The sensitivity, specificity, positive predictive value, negative predictive value, positive likelihood ratio and negative likelihood ratio of MDCT-e and MRI-e were respectively 98.3%, 98.8%, 99.4%, 96.5%, 81.59, 0.02 and 97.2%, 96.4%, 98.3%, 94.1%, 26.89, 0.03. Conclusions Both MDCT-e and MRI-e are accurate in the diagnosis of rectal and sigmoid endometriosis.

Original languageEnglish
Pages (from-to)261-267
Number of pages7
JournalEuropean Journal of Radiology
Issue number2
Publication statusPublished - Feb 2014


  • Bowel endometriosis
  • Enema
  • Magnetic resonance imaging
  • Multidetector computerized tomography
  • Rectum
  • Sigmoid

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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