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Updated: Aug 30, 2026

Transmesenteric Laparoscopic Pyeloplasty in Trendelenburg Position for Horseshoe Kidney with Hydronephrosis
Published on: July 8, 2025
[Retroperitoneal bleeding caused by renal angiomyolipoma]
M T Pruijm1, T H Falke, H G Peltenburg
1Afd. Interne Geneeskunde, Groene Hart Ziekenhuis, Gouda. m.pruijm@wanadoo.nl
Abstract:
An 81-year-old woman presented with left-flank pain, anaemia and a fast irregular pulse while using oral anticoagulation. Diagnostic investigation revealed retroperitoneal bleeding caused by a medium-sized renal angiomyolipoma. Angiomyolipoma was also found in the contralateral kidney. No tuberous sclerosis was ascertained. Bleeding stopped after discontinuation of anticoagulant therapy. Renal angiomyolipoma is an uncommon benign tumour which is frequently associated with tuberous sclerosis. Spontaneous retroperitoneal bleeding is a potentially life-threatening complication. This type of tumour is usually found incidentally on radiological examination.
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