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Visceral artery aneurysms (splenic, hepatic, renal)
Splenic artery aneurysm is the commonest visceral aneurysm, and occurs mainly in women; its rupture in pregnancy is lethal for mother and fetus, so in women of childbearing age every splenic artery aneurysm is repaired regardless of size; visceral pseudoaneurysms — usually after pancreatitis, trauma or a procedure — are always repaired, generally by endovascular embolisation.
Why it matters in the exam
Visceral aneurysms are rare but dangerous, because their rupture causes massive intra-abdominal bleeding. Splenic artery aneurysm accounts for most; it is linked to women, multiple pregnancies, portal hypertension and liver transplantation. Hepatic artery aneurysm is second in frequency, and many are pseudoaneurysms after trauma, biliary surgery or biopsy. A known phenomenon in splenic aneurysm rupture is the "double rupture": a first bleed into the lesser sac that is temporarily contained, followed by free bleeding into the peritoneal cavity. Peripancreatic pseudoaneurysms — from the splenic or pancreaticoduodenal arteries — appear after acute or chronic pancreatitis, and present with bleeding into a pseudocyst, the gastrointestinal tract or the abdominal cavity.
Indications for repair by SVS 2020: a true splenic artery aneurysm — symptomatic, 3 cm or more, growing, and of any size in a woman of childbearing age or in pregnancy and in liver transplant candidates; a hepatic artery aneurysm — 2 cm or more or growing; a renal artery aneurysm — 3 cm or more; SMA and pancreaticoduodenal aneurysms — any size, because rupture risk does not depend on size (and pancreaticoduodenal aneurysms are linked to celiac stenosis); and every pseudoaneurysm — always, at any size. The preferred treatment is endovascular: coil embolisation or a covered stent. In the splenic artery the artery itself can be closed, because the spleen also receives blood from the short gastric arteries. Open surgery is kept for failure or unsuitable anatomy. In a patient with rupture and active bleeding, urgent embolisation is possible in a patient responding to resuscitation, and urgent surgery in an unstable patient.
In a pseudoaneurysm after pancreatitis, embolisation is the first step even when drainage of a pseudocyst is planned later.
Key points
- Splenic artery — the commonest visceral aneurysm.
- Woman of childbearing age — repair at any size.
- Hepatic from 2 cm, splenic and renal from 3 cm.
- Pseudoaneurysm — always.
- Endovascular embolisation is the preferred treatment.
Summary table
| Location | Indication for repair | Preferred treatment |
|---|---|---|
| Splenic artery | Symptoms, 3 cm or more, growth; any size in a woman of childbearing age | Coil embolisation or covered stent |
| Hepatic artery | 2 cm or more or growth | Embolisation or covered stent |
| Renal artery | 3 cm or more | Endovascular or surgery |
| SMA and pancreaticoduodenal arteries | Any size | Endovascular; check for celiac stenosis |
| Pseudoaneurysm | Always | Urgent embolisation |
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Sources
- SVS clinical practice guidelines on the management of visceral aneurysms, 2020 — Indications for repair by location
- ESVS Clinical Practice Guidelines on the Management of Diseases of Mesenteric Arteries and Veins, 2017 — Visceral artery aneurysms
- Rutherford's Vascular Surgery and Endovascular Therapy, 10th edition (2022) — Splanchnic artery aneurysms
Sources are given for further reading; the text is written afresh and not copied from them.
Reviewed by the Examqo AI Professor · 2026-11-06. The text may contain errors; when in doubt, check the source.