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Updated: Feb 1, 2026

Prehospital Thrombolysis: A Manual from Berlin
Published on: November 26, 2013
Post-thrombolysis rupture of small lenticulostriate aneurysms: A report of 2 consecutive cases
Haiyuan Shi1, Chee Keong Wee2, Sindhu John2
1Department of Diagnostic Radiology, Changi General Hospital, Singapore.
The 2018 American Heart Association/American Stroke Association (AHA/ASA) guidelines stated that the administration of intravenous recombinant tissue-type plasminogen activator (rTPA) for acute ischaemic stroke is probably safe for patients with small (i.e. <10 mm) unruptured intracranial aneurysms. We present 2 cases of small (2 and 5 mm) lenticulostriate artery (LSA) aneurysms which ruptured immediately following rtPA infusion. The ensuing acute intracranial haemorrhages resulted in the death of one patient and severe functional impairment for the other. Given the limited literature available, the natural history of LSA aneurysms is largely unknown. This report suggests that LSA aneurysms, regardless of size, be considered separately from other conventional aneurysms as "high-risk" lesions and a contraindication to thrombolysis.
The 2018 American Heart Association/American Stroke Association (AHA/ASA) guidelines stated that the administration of intravenous recombinant tissue-type plasminogen activator (rTPA) for acute ischaemic stroke is probably safe for patients with small (i.e. <10 mm) unruptured intracranial aneurysms. We present 2 cases of small (2 and 5 mm) lenticulostriate artery (LSA) aneurysms which ruptured immediately following rtPA infusion. The ensuing acute intracranial haemorrhages resulted in the death of one patient and severe functional impairment for the other. Given the limited literature available, the natural history of LSA aneurysms is largely unknown. This report suggests that LSA aneurysms, regardless of size, be considered separately from other conventional aneurysms as "high-risk" lesions and a contraindication to thrombolysis.
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