Evaluation of Craniometric Parameters and Efficacy of Posterior Surgical Intervention Types in Basilar Invagination Patients.

Objective: Basilar invagination is one of the most frequently observed abnormalities at the craniovertebral junction, in which the odontoid process of C2 prolapses into the foramen magnum.

Methods: The current study included 27 patients who underwent surgery for basilar invagination between October 2013 and January 2023. The study group was divided into 2 groups according to basilar invagination types; type I (the presence of type A atlantoaxial instability and instability is the main pathology) and type II (the presence of type B and C atlantoaxial instability and skull base dysgenesis is the main pathology).

Predicting the probability of meningioma recurrence in the preoperative and early postoperative period: a multivariate analysis in the midterm follow-up.

We reviewed the clinical, radiological, surgical, and histopathological features of patients with meningiomas to identify factors that can predict tumor recurrence after "microscopic total removal," to improve preoperative surgical planning, and to help determine the need for close radiological observation at shorter intervals or the need for radiotherapy as an adjuvant treatment in the early postoperative period. Clinical data, magnetic resonance imaging studies, angiographic data, operative reports, and histopathological findings were examined retrospectively in 137 patients with a meningioma treated microsurgically and with no evidence of residual tumor on postoperative MR images. Based on univariate analysis, tumor size, a mushroom shape, proximity to major sinuses, edema, osteolysis, cortical penetration, signal intensity on T2-weighted MRIs, pial-cortical arterial supply, presence of a brain-tumor interface in surgery, Simpson's criteria, and histopathological classification were significant predictors for recurrence.

Chondromas of the falx cerebri and dural convexity: report of two cases and review of the literature.

Intracranial chondromas usually arise from the base of the skull. They rarely originate from the convexity dura and falx. Here we describe two cases of intracranial chondroma located at the convexity dura and falx, discuss the genesis, radiologic, histologic features and review the literature.

Intracranial intraosseous hydatid cyst. Case report and review of literature.

Cerebral hydatidosis accounts for approximately 1 to 3% of all cases of hydatid disease. Generally, cerebral hydatid cysts are single lesions located in the watershed of the middle cerebral artery. Primary intracranial extracerebral hydatid cysts are extremely rare.