Publications by authors named "Carlos A Mattozo"
Introduction: Intracranial aneurysms are rare in the pediatric population, and their diagnosis can be challenging. They differ from their adult counterparts in several aspects, and hemorrhage is the most common presentation.
Objective: To evaluate clinical data, aneurysm characteristics, and therapeutic results in a series of patients younger than 19 years of age with intracranial aneurysms.
Cerebral cavernous malformations (CCM) are clusters of dilated sinusoidal channels, lined by a single layer of endothelium. Acquired form of these lesions was related to previous radiation-therapy, and might be related to its pathophysiology, because the vascular endothelial growth factor has higher expression in the immature brain of the child. Consequently, although it occurs mainly in the paediatric population, it can happen in adults.
View Article and Find Full Text PDFThe aim of this article is to discuss the importance of staged surgeries when approaching atypical central neurocytoma in children. Also, we show the preoperative embolization of the lesion as a maneuver to reduce the intraoperative bleeding. Central neurocytomas represent less than 0.
View Article and Find Full Text PDFIntroduction: Clival chordomas have traditionally been removed using a variety of anterior and lateral skull base approaches. Herein, we evaluate the outcomes of patients who underwent an extended endonasal transsphenoidal removal of a clival chordoma.
Method: All consecutive patients with a clival chordoma treated using an endonasal microscope approach were identified.
Object: The authors analyzed the results of stereotactic radiosurgery (SRS) and stereotactic radiotherapy (SRT) for the treatment of recurrent meningiomas that were described at initial resection as showing aggressive, atypical, or malignant features (nonbenign).
Methods: Twenty-five patients who underwent SRS and/or SRT for nonbenign meningiomas between December 1992 and August 2004 were included. Thirteen of these patients underwent treatment for multiple primary or recurrent lesions.
Background: The efficacy of BioGlue (CryoLife, Inc, Atlanta, Ga) surgical adhesive in transsphenoidal surgery was assessed as an adjunct in the prevention of postoperative CSF leaks.
Methods: All patients in whom BioGlue was used for an intraoperative skull base reconstruction were retrospectively identified. Intraoperative CSF leaks were graded according to size (grade 1, small weeping leak without obvious diaphragmatic defect; grade 2, moderate leak with a definite diaphragmatic defect; grade 3, large diaphragmatic and/or dural defect).
Objective: In a series of patients with residual endocrine-inactive macroadenomas who underwent repeat surgery, we assess possible reasons for prior subtotal removal, reoperative success, complication rates, and patient impressions.
Methods: All patients were identified who had a prior subtotal removal of an endocrine-inactive macroadenoma and were reoperated on for residual sellar tumor via an endonasal approach.
Results: Over 6 years, of 188 consecutive patients with endocrine-inactive adenomas, 30 (16%) had repeat surgery (age, 15-77 yr; median interval between surgeries, 25 mo; median follow-up, 20 mo).
Background: Patient impressions remain an important yet often overlooked aspect of surgical success. Herein we present postoperative questionnaire results in patients after a standard direct endonasal approach, an extended suprasellar endonasal approach, and a reoperative transsphenoidal surgery for tumor removal with the operating microscope.
Methods: From July 1998 through April 2005, of 452 patients undergoing endonasal surgery, 346 were sent questionnaires, and of these, 259 (75%) completed them.