Utility of a Steerable Microcatheter for the Selective Transvenous Embolization of Dural Arteriovenous Fistulas.

Objective: Selective transvenous embolization (sTVE) is an effective technique for treating dural arteriovenous fistulas (DAVFs); however, selective catheterization into the shunted pouch is often difficult due to the acute angle of the access route between the target pouch and dural sinus. We present our initial experience using a steerable microcatheter (SM) to manually control the tip angle for selective catheterization and sTVE of DAVFs.

Methods: Thirteen consecutive cases of DAVFs and 16 procedures that involved sTVE using SM between October 2016 and October 2018 were reviewed.

Detailed Anatomy of Bridging Veins Around the Foramen Magnum: a Multicenter Study Using Three-dimensional Angiography.

Background And Purpose: There has been limited literature regarding the bridging veins (BVs) of the medulla oblongata around the foramen magnum (FM). The present study aims to analyze the normal angioarchitecture of the BVs around the FM using slab MIP images of three-dimensional (3D) angiography.

Methods: We collected 3D angiography data of posterior fossa veins and analyzed the BVs around the FM using slab MIP images.

Selective transarterial embolization for arterial hemorrhage after upper third molar extraction: illustrative cases.

Background: The present report describes 2 cases of arterial bleeding after removal of the upper third molar that were successfully treated with selective transarterial embolization.

Observations: The first patient underwent removal of the left upper third molar. A few hours later, facial swelling and massive bleeding appeared near the extraction socket involving the posterolateral wall of the maxillary sinus.

A case of primary small cell neuroendocrine carcinoma of the uterus.

Neuroendocrine carcinoma of the uterine endometrium is extremely rare and found in <1% of all primary endometrial carcinomas. We report a case of neuroendocrine carcinoma of the endometrium detected in a 65-year-old woman and focus our attention on the main imaging features. The low apparent diffusion coefficient value and high maximum standardized uptake value for neuroendocrine cancer serve to distinguish this cancer from endometrial cancer.

Spinal intraosseous arteriovenous fistulas with perimedullary drainage associated with vertebral compression fracture: illustrative case.

Background: Although osseous involvement is occasionally observed in spinal epidural arteriovenous fistulas (AVFs) or seen as a part of diseases of spinal arteriovenous metameric syndrome, purely intraosseous spinal AVFs are extremely rare. Their clinical and imaging characteristic features are not well known. The authors present a case of purely intraosseous AVFs associated with compression fracture.

Angiographic features and transarterial embolization of retained placenta with abnormal vaginal bleeding.

Objectives: To clarify characteristic angiographic features and clinical efficacy of selective transarterial embolization (TAE) of retained placenta with abnormal vaginal bleeding.

Methods: The study cohort comprised 22 patients (mean age, 33.5 years; range, 22-24 years) who underwent selective TAE for retained placenta with abnormal bleeding between January 2018 and December 2020 at our institution.

Direct Carotid Cavernous Fistulas.

A direct carotid cavernous fistula (CCF) is an abnormal shunt between the internal carotid artery (ICA) and the cavernous sinus (CS). Traumatic CCF is the most common type, accounting for up to 75% of all CCFs. For the management of direct CCF, endovascular therapy has become the standard.

Diploic arteriovenous fistulas with marked cortical venous reflux.

Diploic arteriovenous fistulas are rare arteriovenous shunts involving the skull, which often drain antegradely into the internal or external jugular veins. Diploic arteriovenous fistulas with marked cortical venous reflux are extremely rare. Here, we present the case of a patient with diploic arteriovenous fistulas with marked cortical venous reflux and a literature review.