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Retroperitoneal schwannoma mimicking an adnexal mass in pregnancy
  1. Rebecca Allen1 and
  2. Lorin Lakasing2
  1. 1 Imperial College Healthcare NHS Trust, London, UK
  2. 2 Department of Obstetrics, St Mary’s Hospital, London, UK
  1. Correspondence to Dr Lorin Lakasing, lorin.lakasing{at}


A 36-year-old pregnant woman attended her first trimester scan and there was an incidental finding of a right-sided complex cystic adenexal mass. Further investigations including repeat pelvic ultrasound scans and MRI were performed due to its complex nature but were inconclusive. Multidisciplinary team review of images found the mass to be retroperitioneal, neurogenic in origin and involving the L5 vertebrae. The pregnancy continued to term and the baby was delivered at 39 weeks gestation by elective caesarean section due to the mass being likely to obstruct progress in labour. Postnatal biopsy confirmed a schwannoma. Plans were made for resection however as the woman was asymptomatic she declined surgery in favour of completing her family. She conceived again 2 years later and a second pregnancy was managed in the same way. The size of the schwannoma remained stable throughout this period.

  • spinal cord
  • pregnancy
  • radiology
  • neurosurgery
  • ultrasonography

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  • Contributors LL selected the case for submission, took the ultrasound images and supervised the write up of the manuscript. RA prepared the manuscript and performed the literature search.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Patient consent for publication Obtained.

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