Cystic Adenoid Carcinoma of Lacrimal Gland.

Adenoid cystic carcinoma (ACC) is an uncommon malignant tumor that accounts for less than 5% of head and neck cancers. ACC is characteristic for its indolent nature and its propensity for late distant metastases. Late diagnosis, tendency to perineural invasion, periosteal infiltration and local recurrence are factors of poor prognosis.

Intraparenchymal Hemorrhage after Cranioplasty in a Patient with Sinking Flap Syndrome.

Decompressive craniectomy has been increasingly used in recent decades for the treatment of uncontrollable intracranial hypertension caused by trauma, malignant strokes, cerebral venous thrombosis, among others. Sinking flap syndrome (SFS) is a rare complication characterized by neurological deterioration after craniectomy. Here, we report the case of a 73-year-old female patient who presented with disorientation, lip rhyme deviation to the right and left hemiparesis after cardiac catheterization.

Spontaneous subdural effusion in a hospitalized Covid-19 patient: Case report.

Subdural effusions (SE) have already been associated with several viruses, but there are few associations with Covid-19 reported to date, and all of them had one thing in common: the presence of superimposed bacterial rhinosinusitis. Here we describe the case of a 76-year-old male patient that was transferred to our center due to severe SARS-CoV-2 infection and developed a SE during hospital stay. He presented sensory level impairment during hospitalization, but an initial Head CT scan showed no alterations.

Intracranial hemorrhage and Covid-19: A retrospective analysis of 1675 hospitalized Covid-19 Brazilian patients.

Objective: The present study seeks to overcome the lack of data on Covid-19 associated intracranial hemorrhage (ICH) in Brazil.

Methods: This is a retrospective, single-center case series of consecutive patients. It is a subanalysis of a larger study still in progress, which covers all neurological manifestations that occurred in patients admitted between March 1st, 2020 and June 1st, 2022, with active SARS-CoV-2 infection confirmed by polymerase chain reaction test.

Facial trauma followed by osteomyelitis - Case report.

Introduction: Osteomyelitis is an inflammatory-infectious state that may involve trabecular bone, cortical bone, bone marrow and periosteum. The source of the infection may be hematogenic, acquired from an adjoining infectious focus or by direct inoculation into the bone. Its treatment involves antibiotic administration and surgery, but its management remains challenging.

Bleeding risk of small intracranial aneurysms in a population treated in a reference center.

Objective: Large multicenter studies have shown that small intracranial aneurysms are associated with a minimal risk of bleeding. Nevertheless, other large series have shown that most ruptured aneurysms are, in fact, the smaller ones. In the present study, we questioned whether small aneurysms are indeed not dangerous.

Anatomic Nuances of the Ophthalmic Artery Origin from a Ventral Viewpoint: Considerations and Implications for Endoscopic Endonasal Surgery.

Background: The origin of the ophthalmic artery is within the surgical field of endoscopic endonasal approaches (EEAs) to the suprasellar and parasellar regions. However, its anatomy from the endoscopic point-of-view has not been adequately elucidated.

Objective: To highlight the anatomy of the ophthalmic artery origin from an endoscopic endonasal perspective.

Suprasellar Germinomas: 2 Case Reports and Literature Review.

Background: Germinomas are rare malignant central nervous system tumors, a type of germ cell tumor, according to the 2016 World Health Organization Classification of Brain Tumors. Most of these tumors develop along the midline, most often from the pineal gland, followed by tumors arising in the suprasellar cisterns. Suprasellar germinomas commonly manifest with diabetes insipidus, visual impairment, and hypothalamic-pituitary failure.

Optic Canal Decompression: Comparison of 2 Surgical Techniques.

Background: The optic canal is a bony channel that connects the anterior cranial fossa and orbit and contains the optic nerve and ophthalmic artery. It can be affected by several pathologies, leading to compression of the nerve nearby or inside the canal, leading to visual impairment. The usual technique to decompress the canal is through a craniotomy, but recently endoscopic endonasal approaches (EEAs) have surfaced as an interesting alternative due to direct access to the canal without the need for manipulation of neurovascular structures.

Endoscopic-Assisted Posterior Intradural Petrous Apicectomy in Petroclival Meningiomas: A Clinical Series and Assessment of Perioperative Morbidity.

Objective: To describe the clinical feasibility and outcome of the endoscopic-assisted posterior intradural petrous apicectomy approach (PIPA) for petroclival meningiomas extending into the supratentorial space.

Methods: From 2005-2013, 29 patients with a petroclival meningioma underwent tumor removal through a PIPA approach. The approach consists of a retrosigmoid approach, intradural anterior resection of the petrous apex and microsurgical removal of the tumor, followed by endoscopic-assisted visualization and removal of tumor parts in the middle fossa or anterior to the brainstem.

MRI-based radiation-free method for navigated percutaneous radiofrequency trigeminal rhizotomy.

Unlabelled: BACKGROUND/STUDY AIMS: Percutaneous radiofrequency trigeminal rhizotomy (RTR) is a standardized treatment for trigeminal neuralgia, yet it has been associated with serious complications related to the cannulation of the foramen ovale. Some of these complications, such as carotid injury, are potentially lethal. Neuronavigation was recently proposed as a method to increase the procedure's safety.

Endoscopic endonasal anatomical study of the cavernous sinus segment of the ophthalmic nerve.

Objectives/hypothesis: This cadaveric study analyzes the endoscopic endonasal anatomy of the ophthalmic division of the trigeminal nerve (V1 ), from the middle fossa to its orbital entry via the superior orbital fissure. Anatomical relationships with the surrounding cranial nerves and blood vessels are described, with emphasis on their clinical correlation during surgery in this region. Our objective was to describe the anatomical relationships of the ophthalmic division of the trigeminal nerve.

Endoscopic endonasal surgical management of chondrosarcomas with cerebellopontine angle extension.

Object: Skull base chondrosarcomas are slow-growing, locally invasive tumors that arise from the petroclival synchondrosis. These characteristics allow them to erode the clivus and petrous bone and slowly compress the contents of the posterior fossa progressively until the patient becomes symptomatic, typically from cranial neuropathies. Given the site of their genesis, surrounded by the petrous apex and the clival recess, these tumors can project to the middle fossa, cervical area, and posteriorly, toward the cerebellopontine angle (CPA).