Susceptibility-weighted MRI of extra-ovarian endometriosis: preliminary results

Mayumi Takeuchi, Takeuchi M, Kenji Matsuzaki, Matsuzaki K, Harada M, Masafumi Harada
Abdominal imaging · 2015 · vol. 40(7) , pp. 2512–2516 · doi:10.1007/s00261-015-0378-z · PMID:25682291 · W2131887653
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⚙ AI-generated summary by claude@2026-06+body, 2026-06-28 ⓘ

Susceptibility-weighted imaging detected signal voids reflecting hemorrhage in 100% of extra-ovarian endometriosis lesions, while T1-weighted imaging detected high-intensity foci reflecting hemorrhage in only 50%.

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⚙ AI-generated deep summary by claude@2026-06, 2026-06-09 · read from full text ⓘ

This descriptive study evaluated susceptibility-weighted imaging (SWI) and fat-saturated T1-weighted imaging (fsT1WI) in eight pathologically proven cases of extra-ovarian endometriosis, involving bowel (n=3), bladder (n=2), and abdominal wall (n=3) lesions, acquired on a 1.5T MRI scanner. On fsT1WI, high-intensity foci consistent with subacute hemorrhage were seen in 4 of 8 lesions (50%), while SWI demonstrated signal voids consistent with acute to chronic hemorrhage in all 8 lesions (100%). The study’s main limitation is its very small, descriptive cohort with preliminary results, without larger validation or formal diagnostic accuracy testing. This paper is centrally about endometriosis—specifically extra-ovarian endometriosis and the use of susceptibility-weighted MRI to characterize hemorrhage within lesions.

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Abstract

PurposeExtra-ovarian endometriosis (EOE) usually appears as solid masses mimicking neoplasms both clinically and radiologically. Detection of blood products within a lesion may be suggestive of its endometriotic nature. We present a descriptive study of MR imaging findings that include susceptibility-weighted imaging (SWI) for patients with EOE.MethodsEight pathologically proven EOE (3 bowel, 2 bladder and 3 abdominal wall) were evaluated. Fat-saturated T1-weighted images (fsT1WI) and SWI were obtained using 1.5T MR imaging. Images were reviewed for the presence of signal voids on SWI and of high-intensity foci on fsT1WI.ResultsHigh-intensity foci reflecting subacute hemorrhage were detected in 4 of 8 lesions (50%) on fsT1WI, whereas signal voids reflecting acute to chronic hemorrhage were detected in all 8 lesions (100%) on SWI.ConclusionsSWI is a sensitive MRI technique which demonstrates hemorrhage of varying chronicity in patients with EOE and may improve future MRI characterization of EOE.
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Abstract

Purpose Extra-ovarian endometriosis (EOE) usually appears as solid masses mimicking neoplasms both clinically and radiologically. Detection of blood products within a lesion may be suggestive of its endometriotic nature. We present a descriptive study of MR imaging findings that include susceptibility-weighted imaging (SWI) for patients with EOE.

Methods

Eight pathologically proven EOE (3 bowel, 2 bladder and 3 abdominal wall) were evaluated. Fat-saturated T1-weighted images (fsT1WI) and SWI were obtained using 1.5T MR imaging. Images were reviewed for the presence of signal voids on SWI and of high-intensity foci on fsT1WI.

Results

High-intensity foci reflecting subacute hemorrhage were detected in 4 of 8 lesions (50%) on fsT1WI, whereas signal voids reflecting acute to chronic hemorrhage were detected in all 8 lesions (100%) on SWI.

Conclusions

SWI is a sensitive MRI technique which demonstrates hemorrhage of varying chronicity in patients with EOE and may improve future MRI characterization of EOE. Similar content being viewed by others

References

Olive DL, Schwartz LB (1993) Endometriosis. N Engl J Med 328:1759–1769 Bazot M, Darai E, Hourani R, et al. (2004) Deep pelvic endometriosis: MR imaging for diagnosis and prediction of extension of disease. Radiology 232:379–389 Gougoutas CA, Siegelman ES, Hunt J, Outwater EK (2000) Pelvic endometriosis: various manifestations and MR imaging findings. Am J Roentgenol 175:353–358 Choudhary S, Fasih N, Papadatos D, Surabhi VR (2009) Unusual imaging appearances of endometriosis. Am J Roentgenol 192:1632–1644 Wong-You-Cheong JJ, Woodward PJ, Manning MA, Davis CJ (2006) From the archives of the AFIP: inflammatory and nonneoplastic bladder masses: radiologic-pathologic correlation. Radiographics 26:1847–1868 Gidwaney R, Badler RL, Yam BL, et al. (2012) Endometriosis of abdominal and pelvic wall scars: multimodality imaging findings, pathologic correlation, and radiologic mimics. Radiographics 32:2031–2043 Togashi K, Nishimura K, Kimura I, et al. (1991) Endometrial cysts: diagnosis with MR imaging. Radiology 180:73–78 Siegelman ES, Outwater EK (1999) Tissue characterization in the female pelvis by means of MR imaging. Radiology 212:5–18 Siegelman ES, Outwater E, Wang T, Mitchell DG (1994) Solid pelvic masses caused by endometriosis: MR imaging features. Am J Roentgenol 163:357–361 Busard MP, Mijatovic V, van Kuijk C, Hompes PG, van Waesberghe JH (2010) Appearance of abdominal wall endometriosis on MR imaging. Eur Radiol 20:1267–1276 Busard MP, Mijatovic V, Lüchinger AB, et al. (2012) MR imaging of bladder endometriosis and its relationship with the anterior uterine wall: experience in a tertiary referral centre. Eur J Radiol 81:2106–2111 Haacke EM, Xu Y, Cheng YC, Reichenbach JR (2004) Susceptibility weighted imaging (SWI). Magn Reson Med. 52:612–618 Sehgal V, Delproposto Z, Haddar D, et al. (2006) Susceptibility-weighted imaging to visualize blood products and improve tumor contrast in the study of brain masses. J Magn Reson Imaging 24:41–51 Takeuchi M, Matsuzaki K, Nishitani H (2008) Susceptibility-weighted MRI of endometrioma: preliminary results. Am J Roentgenol 191:1366–1370 Solak A, Sahin N, Genç B, et al. (2013) Diagnostic value of susceptibility-weighted imaging of abdominal wall endometriomas during the cyclic menstrual changes: a preliminary study. Eur J Radiol 82:e411–e416 Busard MP, Pieters-van den Bos IC, Mijatovic V, et al. (2012) Evaluation of MR diffusion-weighted imaging in differentiating endometriosis infiltrating the bowel from colorectal carcinoma. Eur J Radiol 81:1376–1380 Löbel U, Sedlacik J, Sabin ND, et al. (2010) Three-dimensional susceptibility-weighted imaging and two-dimensional T2*-weighted gradient-echo imaging of intratumoral hemorrhages in pediatric diffuse intrinsic pontine glioma. Neuroradiology 52:1167–1177 Author information Authors and Affiliations Corresponding author Rights and permissions About this article Cite this article Takeuchi, M., Matsuzaki, K. & Harada, M. Susceptibility-weighted MRI of extra-ovarian endometriosis: preliminary results. Abdom Imaging 40, 2512–2516 (2015). https://doi.org/10.1007/s00261-015-0378-z Published: Issue date: DOI: https://doi.org/10.1007/s00261-015-0378-z

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Condition tags

endometriosis

MeSH descriptors

Abdominal Wall Endometriosis Gastrointestinal Diseases Intestines Magnetic Resonance Imaging Urinary Bladder Diseases Abdominal Wall Adult Endometriosis Female Gastrointestinal Diseases Humans Intestinal Diseases Intestinal Diseases Intestines Reproducibility of Results Retrospective Studies Sensitivity and Specificity Urinary Bladder Urinary Bladder

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