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Background: Endovascular treatment options for direct carotid-cavernous fistula (CCF) include transarterial or transvenous embolization with detachable coils and balloons, parent artery occlusion, or the use of flow-diverting stents across the fistula. Although combined transarterial and transvenous embolization is uncommon, it can be advantageous. We present a case of direct CCF treated successfully with a combined approach using a minimal number of detachable coils., Case Description: A 33-year-old female presented with tinnitus and headache following cesarean delivery and was transferred to our hospital. Cerebral angiography revealed a high-flow shunt from the superior lateral wall of the left cavernous internal carotid artery directly into the cavernous sinus, with a 3.5 × 2.8 mm shunted pouch. A diagnosis of direct CCF was confirmed. To maximize the packing density within the shunted pouch and to manage various situations during embolization, a combined transarterial and transvenous approach was utilized. Complete obliteration of the shunt was achieved without complications using only four detachable coils. The patient was discharged on postoperative day 3 with a modified Rankin Scale score of 0, and there has been no recurrence during the 6-month follow-up., Conclusion: Direct CCF cases are relatively rare and complex to treat. This case illustrates practical strategies and considerations for achieving complete shunt obliteration with minimal intervention, highlighting the effectiveness of combined transarterial and transvenous embolization., Competing Interests: There are no conflicts of interest., (Copyright: © 2025 Surgical Neurology International.)

Advancements in perinatal care have improved survival rates of extremely preterm infants born at 22 to 23 weeks of gestation, thus introducing new ethical challenges associated with their treatment. Therefore, we reviewed the epidemiological prognosis, treatment evolution, and ethical considerations associated with the care of preterm infants at the limit of viability. We comprehensively searched PubMed to find relevant English-language articles published between January 2014 and July 2024. Survival rates of infants born at 22 to 23 weeks of gestation have improved but remain low. Proactive treatment can result in survival rates exceeding 50% for infants born at 22 weeks; however, these infants are at high risk for complications and neurodevelopmental impairment. Advancements in obstetric and neonatal care have contributed to improved outcomes. Ethical challenges include balancing survival with the disability risk, managing patients with uncertain prognoses, and considering parental wishes.Conclusion: The care of preterm infants at the limit of viability presents complex ethical dilemmas. Shared decision-making between healthcare providers and families as well as engaging in societal discourse are crucial to addressing these challenges., Competing Interests: Declarations. Ethics approval: Not applicable. Consent to participate: Not applicable. Consent to publish: Not applicable. Competing interests: The authors declare no competing interests., (© 2025. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)