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Spontaneous rupture of renal angiomyolipoma during pregnancy
  1. Li Ao,
  2. Eriko Ogasahara,
  3. Yasuhiko Okuda,
  4. Shuji Hirata
  1. Department of Obstetrics and Gynecology, University of Yamanashi, Chuo, Yamanashi, Japan
  1. Correspondence to Dr Li Ao, aoli{at}


A renal angiomyolipoma (AML) is a rare benign tumour of kidney origin. Pregnancy is known to be associated with an increased risk of tumour rupture causing hypovolaemic shock, which is usually managed surgically or through an embolisation procedure. However, having surgery during pregnancy predisposes the mother to a preterm delivery, and the unknown influences of radiation exposure to the fetus make the management of such cases very challenging. A 30-year-old pregnant woman had a sudden onset of gross haematuria at the 20th week of her pregnancy. The MRI showed a 10 cm mass suggestive of AML in the left kidney, with evidence of an intrarenal haematoma. To avoid an iatrogenic preterm delivery and unnecessary fetal exposure to radiation, conservative management was conducted until 34 weeks of gestation, when she came to our hospital reporting of flank pain. An endovascular treatment was performed immediately after an emergency caesarean delivery.

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  • Contributors LA contributed to conception and design, acquisition of the data and analysis; drafted the article and provided final approval. EO and YO contributed to analysis and interpretation of the data; revised it critically for important intellectual content and provided final approval. SH contributed to concept and design and analysis and interpretation of the data; drafted the manuscript; revised it critically for important intellectual content and provided final approval.

  • Competing interests None declared.

  • Patient consent Obtained.

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