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Retroperitoneal capillary arteriovenous malformation mimicking a malignant neoplasm
Kazuki Yanagida1, Tomoyuki Kaneko1, Koji Saito2
1Department of Urology Teikyo University School of Medicine Tokyo Japan.
IJU Case Reports
|November 6, 2023
Summary
Retroperitoneal tumors are rare, with vascular malformations being even rarer. This case highlights a challenging diagnosis of a retroperitoneal capillary arteriovenous malformation.
Area of Science:
- Vascular Surgery
- Radiology
- Pathology
Background:
- Retroperitoneal tumors represent a small fraction of all neoplasms.
- Vascular malformations within the retroperitoneum are exceptionally uncommon.
- Most reported cases involve venous malformations, making other types exceedingly rare.
Observation:
- A 72-year-old woman presented with a 27-mm retroperitoneal tumor.
- Imaging revealed a heterogeneously enhanced mass with well-defined borders.
- Dynamic contrast-enhanced MRI showed rapid arterial enhancement and delayed filling, suggesting vascular malformation but lacking definitive preoperative diagnosis.
Findings:
- Histopathological diagnosis confirmed the retroperitoneal mass as a capillary arteriovenous malformation.
- The tumor was successfully excised laparoscopically.
- Preoperative diagnosis of this specific vascular malformation subtype was challenging.
Implications:
- This case underscores the diagnostic difficulties associated with rare retroperitoneal vascular malformations.
- Laparoscopic excision is a viable therapeutic and diagnostic approach.
- Increased awareness of such rare entities is crucial for accurate preoperative diagnosis and management.
