Oswaldo Inácio de Tella

Learn More
Paraffin-embedded surgical specimens from 55 meningiomas were immunostained after microwave processing using the streptavidin/peroxidase method and the monoclonal antibody (moAb) MIB-1 to the Ki-67 antigen. The authors assessed proliferative labelling index (LI) from a series of surgically removed meningiomas using immunohistochemical methods and MIB-1, and(More)
¶Objective. Meningeal melanocytoma generally occurs in the posterior fossa. Orbital manifestation is rarely encountered. Methods. A thirty-five year-old man presented with progressive proptosis of his right eye. Computed tomography (CT) and Magnetic Resonance Imaging (MRI) of the brain showed an expansive intraconal mass lesion occupying the superior(More)
Mucoceles are benign, slowly expansive, mucous-filled cystic lesions that arise in the paranasal sinuses. They most commonly occur in the frontal and ethmoid sinuses and are rarely in the sphenoid sinus. The incidence of sphenoid sinus mucoceles is about 1% of paranasal sinus mucoceles. Almost 200 cases of sphenoidal and or intraselar mucoceles have been(More)
An endoscopic endonasal transsphenoidal approach to the sella was performed in 100 consecutive patients, with a follow up from 3 to 55 months: 57 females and 43 males, age ranging from 14 and 70 years. 76 cases pituitary adenomas: 22 were acromegaly (7 microadenomas and 15 macroadenomas); 21 null cell adenomas (3 microadenomas and 18 macroadenomas); 19(More)
OBJECTIVE To determine if there was a relationship between intrassellar pressure (ISP) and pituitary tumor volume. METHOD Between August 2002 and May 2004, 60 patients aged between 13 and 75 years old (39 males), having a pituitary adenoma were submitted to an endoscope transseptal approach. During the surgery and before tumor resection, 2 mm of the(More)
Olfactory groove meningiomas compromise approximately 8-18% of intracranial meningiomas and harbor frequently large sizes when diagnosticated. We report 13 consecutive cases operated on Hospital São Paulo and Hospital Professor Edmundo Vasconcelos between 1995 and 2003. These patients were retrospectively studied regarding clinical preservation, surgical(More)
We report our experience with 19 cases of ACTH secreting pituitary adenomas. They were microadenomas in 50% of the cases, coming with the typical picture of the Cushing syndrome. The ACTH adenoma associated with other types of hormones tend to show visual alterations. The treatment is often surgical using the transsphenoidal approach. The results were(More)
Esthesioneuroblatoma (ENB) is a rare tumor arising from the olfactory epithelium of the nasal vault which frequently invades the cranial base, cranial vault and orbit. ENB has a bimodal age distribution between 11 and 20 years and between 51 and 60 years. ENB accounts for approximately 1 to 5% of intranasal cancers and no consensus has been reached(More)
Posterior longitudinal ligament ossification of cervical spine is a rare condition among caucasians. A 42 years old japanese patient with progressive walking difficulty was diagnosed with this pathology by CT scan and MRI and treated surgically by an anterior approach with arthrodesis. Pathophysiology, racial prevalence, clinical picture, radiological(More)
OBJECTIVE The aim of this study is to correlationate demographic, radiologic features and proliferative index defined by immunohistochemical expression of Mib-1 in olfactory groove meningiomas, and to observe possible predictive factors of recurrence of this tumor. METHOD There were analysed demographic, clinical and radiological features of 15 patients(More)