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Open research questions in Vascular Malformations Diagnosis and Treatment

52 unresolved questions extracted from the limitations and future-work sections of 254 Vascular Malformations Diagnosis and Treatment papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • The underlying mechanisms of cerebral proliferative angiopathy are not well understood. The diagnostic criteria and treatment strategies for the disease are not well established.

    Presentación inusual de la angiopatía proliferativa cerebral: lesiones extensas con mínima expresión clínica · 2026 · DOI

  • The effect of deep venous drainage on postoperative functional decline remains incompletely defined. Prior studies have suggested that deep venous drainage is a complicating factor in AVM surgery, but the extent to which it worsens outcomes is unclear.

    International multi-center study to quantify the effect of deep venous drainage after surgical resection of Spetzler-Martin Grade II-III brain arteriovenous malformations · 2026 · DOI

  • Further research is needed to determine the optimal management of ruptured AVM during pregnancy. Studies should investigate the safety and efficacy of different treatment approaches in such cases.

    Case Report: “Damage control” in obstetric neurosurgery: staged management of ruptured arteriovenous malformation with herniation · 2026 · DOI

  • The management of intracranial AVMs during pregnancy is a subject of debate. There is a need for further research on the optimal management of such cases.

    Case Report: “Damage control” in obstetric neurosurgery: staged management of ruptured arteriovenous malformation with herniation · 2026 · DOI

  • Diagnostic and therapeutic challenges in managing AVMs and CHDs in the pediatric population. The need for early recognition and tailored treatment strategies. The complexity of AVMs and CHDs, which can lead to life-threatening complications.

    The relation between cerebral arteriovenous malformations and heart diseases in the pediatric population: a systematic review and meta-analysis · 2026 · DOI

  • Heterogeneity of existing studies. Limited understanding of the natural history of pediatric bAVMs. Need for standardized reporting and outcome definitions.

    Management of pediatric brain arteriovenous malformation: a systematic review of retrospective studies · 2026 · DOI

  • The coexistence of AVM and DVA is a rare neurovascular association. There is a lack of understanding of the imaging features and clinical implications of this association.

    Coexistence of a Hemispheric Developmental Venous Anomaly and Two Ipsilateral Arteriovenous Malformations: A Rare Neurovascular Association · 2026 · DOI

  • Further studies are needed to confirm the study's findings and to explore the underlying mechanisms by which deep venous drainage affects postoperative functional decline. The development of personalized treatment plans for patients with AVMs may be informed by the study's findings.

    International multi-center study to quantify the effect of deep venous drainage after surgical resection of Spetzler-Martin Grade II-III brain arteriovenous malformations · 2026 · DOI

  • BACKGROUND Rotational vertebrobasilar ischemia, also known as bow hunter’s syndrome (BHS), is an underrecognized cause of posterior circulation stroke.

    Bilateral bow hunter’s syndrome at the craniocervical junction: illustrative case · 2026 · DOI

  • This case expands the limited literature on angiographically detectable intraventricular CMs and highlights a complementary role for angiography in selected cases.

    Intraventricular giant cavernous malformation mimicking central neurocytoma characterized by digital subtraction angiography: illustrative case · 2026 · DOI

  • Intraventricular CMs are particularly uncommon, and their angiographic features remain poorly characterized.

    Intraventricular giant cavernous malformation mimicking central neurocytoma characterized by digital subtraction angiography: illustrative case · 2026 · DOI

  • In this review, we synthesize recent advances in bAVM genetics and molecular biology, highlighting their implica- tions for pathophysiology, endothelial dysfunction, and vas- cular remodeling. The accumulating evidence supports the concept that bAVM is a dynamic and multifactorial lesion that can emerge and evolve through the interplay of somatic mutations, chronic inflammation, and hemodynamic stress. In particular, the discovery of somatic mutations within lesional ECs represents a major breakthrough in elucidat- ing mechanisms of lesion formation and endothelial dys- function. Moreover, growing data implicate dysregulated Translational Stroke Research (2026) 17:42 1 3 signaling pathways, aberrant transcriptional programs, and immune-mediated processes, further deepening our under- standing of bAVM pathobiology and its vascular remodel- ing programs. Although the full disease mechanism remains incompletely defined, integrating these complementary lines of evidence may enable a more coherent view of bAVM as a unified biological entity. At present, no molecular targeted therapy has been established for bAVMs; however, recent advances suggest that bAVMs may become actionable tar- gets guided by molecular information. Continued efforts are needed to strengthen translational research and to build a robust evidence base that supports the development and evaluation of new therapeutic strategies.

    Advances in the Genetics and Molecular Biology of Brain Arteriovenous Malformations · 2026 · DOI

  • Further studies are needed to investigate the mechanisms by which Pdgfrβ F7 mutations enhance bAVM severity. The development of therapeutic approaches targeting Pdgfrβ F7 mutations may be a promising area of research.

    Platelet-derived growth factor receptor β F7 mutations result in and exacerbate the severity of vascular dysplasia in the brain arteriovenous malformation through enhancing angiogenesis · 2026 · DOI

  • The role of Pdgfrβ F7 mutations in bAVMs has not been previously studied. The mechanisms by which Pdgfrβ F7 mutations enhance bAVM severity are not fully understood.

    Platelet-derived growth factor receptor β F7 mutations result in and exacerbate the severity of vascular dysplasia in the brain arteriovenous malformation through enhancing angiogenesis · 2026 · DOI

  • At the same time, the zero-event categories and missing reporting in some stud- ies highlight an important limitation of the evidence base: several outcomes were inconsistently described, making it Child's Nervous System (2026) 42:227 Page 7 of 17 227 Fig.

    The relation between cerebral arteriovenous malformations and heart diseases in the pediatric population: a systematic review and meta-analysis · 2026 · DOI

  • There are no previous reports of SDAVF presenting with symptoms solely contralateral to the shunt origin. The varied initial presentation of SDAVF often results in diagnostic difficulties and delayed intervention.

    Isolated contralateral radiculopathy in thoracic spinal dural arteriovenous fistula without myelopathy: illustrative case · 2026 · DOI

  • DAVFs are often overlooked in the differential diagnosis of seizures in older adults. There is a need for increased awareness of DAVFs as a cause of epilepsy in older adults.

    An Elderly Patient With Status Epilepticus Caused by a Dural Arteriovenous Fistula · 2026 · DOI

  • The review is limited to retrospective studies, which may introduce bias. The heterogeneity of the included studies precluded quantitative pooling of individual angioarchitectural risk factors. The review highlights the need for standardized reporting and long-term surveillance in children.

    Management of pediatric brain arteriovenous malformation: a systematic review of retrospective studies · 2026 · DOI

  • The current literature includes only 4 murine studies due to the lack of clinical studies evaluating ROCK inhibi- tors, a major limitation of this review. Due to incom- plete modeling of key aspects of CCM pathobiology, generalizability is likely limited. Thus, the feasibility of these findings for human patients is uncertain. There are obvious qualitative heterogeneities among the stud- ies, including differences in mouse strain, type of ROCK inhibitor, dose, route of administration, and endpoints. Sex was incompletely reported across included studies, and female cohorts were systematically underrepresented due to Trp53⁻/⁻-associated developmental lethality rather than study design. These constraints should be consid- ered when interpreting the sex-stratified findings. Isoform specificity, indirect modulators such as statins, and out- come measures could explain the lack of translation from promising preclinical results to clinical outcomes. Even though most studies used fasudil as an intervention, one study used another ROCK inhibitor, and the studies used different dosages and administration routes. Additionally, there is no direct human equivalent dose. Although the reviewed preclinical studies did not reveal overt adverse signals related to acute tolerability, none incorporated GLP (Good Laboratory Practice) compliant toxicology studies required for regulatory safety assessment. Safety evaluations were limited to mortality, attrition rates, body weight, and general health observations; hematological, biochemical, and histopathological systemic assessments were [38] not included, nor were toxicological thresh- old values such as the no observed adverse effect level (NOAEL) and the lowest observed adverse effect level (LOAEL). Therefore, GLP-compliant toxicology studies are required before clinical translation.

    Rho-associated kinase inhibitors in cerebral cavernous malformations: a preclinical systematic review · 2026 · DOI

  • To advance these preclinical findings into clinical set- tings, several important research areas need to be addressed, including safety and tolerability profiling, pharmacokinetic and pharmacodynamic characterization, optimization of dosing regimens, and the identification of clinically relevant endpoints. Future studies should use standardized and multicenter designs to reduce the signif- icant methodological heterogeneity. Instead of focusing solely on short-term results, imaging-based approaches are needed to evaluate long-term effectiveness, lesion- reduction persistence, and safety. At the mechanistic level, it is essential to explain how ROCK inhibition interacts with key CCM-related pathways, such as endo- thelial dysfunction, and to identify biomarkers that pre- dict therapeutic response. 1 3Neurosurgical Review (2026) 49:437 Extensive pharmacological evaluations, Blood-Brain Barrier (BBB) penetration assessments, and the develop- ment of clinically applicable biomarkers are crucial before moving to clinical studies. Given the inherent barrier dis- ruption in CCM, the necessity of BBB penetration remains unclear. These steps will be essential for determining whether ROCK inhibitors can translate from promising preclinical findings into a truly disease-modifying therapy for CCM. From another perspective, it is also important to con- sider the rapidly expanding roles of artificial intelligence (AI) and three-dimensional preoperative planning in neuro- surgery, which may enhance surgical access to deep-seated cavernous malformations [41–45]. Although clinical inte- gration has progressed more slowly than technological development, AI-focused applications in CCM remain relatively scarce. Nevertheless, the available evidence sug- gests that AI may enhance diagnostic accuracy, refine risk stratification, and support surgical planning [46]. As such, AI-based approaches are a promising emerging direction in CCM diagnosis and management, and future research should place greater emphasis on developing and validat- ing these tools.

    Rho-associated kinase inhibitors in cerebral cavernous malformations: a preclinical systematic review · 2026 · DOI

  • There is a need for a comprehensive review of the embryology, anatomy, and clinical relevance of persistent primitive intracranial arteries. The paper identifies a gap in understanding the clinical implications of these arteries.

    Embryonic, anatomical, and clinical significance of persistent primitive intracranial arteries · 2026 · DOI

  • While stapes surgery effectively treats conductive hearing loss, its impact on pulsatile tinni- tus remains uncertain. essential for accurate diagnosis, safe surgical planning, and targeted therapeutic interventions, highlighting the need for increased awareness and further research into their clin- ical implications.

    Embryonic, anatomical, and clinical significance of persistent primitive intracranial arteries · 2026 · DOI

  • There is a lack of awareness about the diagnosis and treatment of DAVF. The clinical symptoms of DAVF can be complex and varied, making diagnosis difficult.

    Spontaneous cavernous sinus dural arteriovenous fistula with remote cerebellar hemorrhage: A case report · 2026 · DOI

  • The natural history of CCJ AVFs remains incompletely defined. The rarity and vascular complexity of CCJ AVFs complicate radiologic identification and neurosurgical planning.

    Arteriovenous fistulas at the craniocervical junction: a review · 2026 · DOI

  • The study only included systematic reviews that compared intravenous rt-PA with placebo. The meta-analysis was limited by the availability of data from the included studies. The study did not assess the quality of the individual studies included in the systematic reviews.

    Hemorragia cerebral asociada a alteplasa en accidente cerebrovascular isquémico: revisión de revisiones sistemáticas y metaanálisis · 2026 · DOI

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52 open questions have been extracted from the limitations and future-work passages of 254 Vascular Malformations Diagnosis and Treatment papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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