Lino Mascarenhas

Centro Hospitalar de Vila Nova de Gaia/Espinho | CHVNG/E · Department of Neurosurgery

Rosette-forming glioneuronal tumor (RGNT) is a rare and indolent mixed glioneuronal tumor involving primarily the fourth ventricular region and occurring predominantly in young adults. We present a case of a 44-year-old woman presented with progressive headaches, vomiting, and a sudden decreasing level of consciousness. The magnetic resonance imagi...

Purpose We describe a rare case of histopathologic-proven necrotizing infundibulo-hypophysitis (NIH). Clinical history A 40-year-old female presented with coexistence of central diabetes insipidus and hypopituitarism. Imaging disclosed a thickened infundibulum and a diffusely enlarged pituitary mass with gadolinium rim enhancement pattern. Microsu...

https://amacc.med.up.pt/docs/12%20Congresso%20-%20Apresenta%C3%A7%C3%A3o%2012%20-%20Tumores%20de%20origem%20neurol%C3%B3gica.pdf

Background/Aims: This study aimed at documenting the patterns of intracranial hemorrhage encountered by means of brain computed tomography (CT) scan and characterizing the chief complaint that led to the diagnosis. Methods: All the brain CT scans performed in a hospital serving 334,081 inhabitants in a 1-year period were reviewed. Categories of cl...

We present the case of a 29 year-old male with a tumor involving the mesencephalic tectum with associated hydrocephalus. Third ventriculocisternostomy was performed along with endoscopic biopsy; this provided adequate sampling of the tumor and enabled diagnosis of rosette-forming glioneural tumor (RGNT). The patient was followed for 48 months witho...

Os prolactinomas gigantes são tumores raros, mais frequentes em homens, cujos critérios de diagnóstico incluem adenoma hipofisário com maior eixo igual ou superior a 4cm e extensão extrasselar, valor sérico de prolactina ≥1.000ng/mL e exclusão de secreção concomitante de hormona de crescimento (HC) ou corticotrofina (ACTH).

OBJECT The expansion of endovascular procedures for obliteration of cerebral aneurysms highlights one of the drawbacks of clip ligation through the transcranial route, namely brain retraction or brain transgression. Sporadic case reports have emerged over the past 10 years describing endonasal endoscopic clip ligation of cerebral aneurysms. The aut...

Objectives: Postoperative pneumocephalus is a common occurrence after endoscopic endonasal skull base surgery (ESBS). The risk of cerebrospinal fluid (CSF) leaks can be high and the presence of postoperative pneumocephalus associated with serosanguineous nasal drainage may raise suspicion for a CSF leak. The authors hypothesized that specific patt...

http://www.rpmgf.pt/ojs/index.php/rpmgf/article/view/11287/11010

The facial nerve is the third most frequent location of intracranial schwannomas, with facial paresis the most common sign.(1,2) A 77-year-old woman presented with amnesia; the Mini-Mental State Examination score was 26, with normal cranial nerve function. A giant multicystic VII nerve schwannoma was identified in the left middle fossa, with compon...

Primary spinal glioblastoma (GBM) is a rare disease, with an aggressive course and a poor prognosis. We report a case of a 19-year-old male with a 4-week history of progressive weakness in both lower limbs, which progressed to paraparesis with a left predominance and difficulty in initiating urination over a week. Spine magnetic resonance imaging (...

Objective: To present a large series of patients and examine the learning curve of the endonasal endoscopic transplanum, transtuberculum approach for primarily suprasellar or sellar-suprasellar tumors. Methods: We identified 122 patients who underwent 126 surgeries using the transplanum, transtuberculum approach. Extent of resection was determin...

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Cavernous malformations (CMs) confined to the cranial nerves (CN) are extremely rare lesions. The authors report 2 cases of CMs, one involving the trigeminal nerve presenting with a 3 years history of a refractory right trigeminal neuralgia that was microsurgically resected by a retromastoid approach with resolution of the neuralgia; and another CM...

The case of a 76-year-old male with a large chronic subdural hematoma that showed total regression with the mere suspension of aspirin, its only apparent causal factor, and that of an 81 year-old male on aspirin and clopidogrel with a chronic subdural hematoma who succumbed after burr holes due to two simultaneous severe hemorrhagic complications (...

Una mujer de 56 años fue intervenida de un aneurisma carotido-oftálmico roto. La inspección visual intraoperatoria confirmaba que la arteria oftálmica estaba intacta. Tras la cirugía la paciente no percibía luz por dicho ojo y la angiografía una semana después de la cirugía confirmó la exclusión del aneurisma, con falta de relleno de la porción pro...

A 56-year-old woman underwent surgery for a ruptured carotid-ophthalmic artery aneurysm. Intraoperative visual inspection confirmed that the ophthalmic artery was left intact. She had no light perception on the operated side right after surgery. Angiography one week after surgery confirmed exclusion of the aneurysm, no filling of the proximal porti...

A hypo-coagulated 58-year-old female complained of headaches right after being exposed to the first pressure waves generated during an exhibition of fireworks. The day after she presented with seizures and the CT scan showed subdural hemorrhage over the left frontoparietal sulci. Eight hours after admission she disclosed left lower limb hypo-esthes...

El glioblastoma de células gigantes es una variante rara dentro de los glioblastomas (5% de los casos). En la clasificación de la Organización Mundial de la Salud esta entidad ha merecido una categoría aparte en los tumores de grado IV. Se revisan las características clínicas, radiológicas, histológicas, inmunohistoquímicas y las alteraciones genét...

El glioblastoma de células gigantes es una variante rara dentro de los glioblastomas (5% de los casos). En la clasificación de la Organización Mundial de la Salud esta entidad ha merecido una categoría aparte en los tumores de grado IV. Se revisan las características clínicas, radiológicas, histológicas, inmunohistoquímicas y las alteraciones genét...

Il s’agit d’un cas de tumeur fibreuse solitaire de l’orbite avec malignité histologique, révélée par une exophtalmie sans baisse de l’acuité visuelle, chez une femme de 28 ans. La résection totale de la tumeur a été réalisée par craniotomie fronto-orbitaire. L’efficacité des traitements complémentaires dans ce type de tumeur est controversée et la...

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A cavernous malformation involving the Gasserian ganglion, 2nd and 3rd divisions of the trigeminal nerve on the left side was resected via an extradural route in a 54 year old male. Cavernous malformations of the cranial nerves are rare. Specific origin from the trigeminal nerve has not been previously reported.

Una malformación cavernosa afectando el ganglio de Gasser, la segunda y tercera divisiones del nervio trigémino fue resecada por vía extradural en un varón de 54 años. Las malformaciones de los nervios craneales son raras. Su origen específico en el nervio trigémino no ha sido descrito previamente.

Una malformación cavernosa afectando el ganglio de Gasser, la segunda y tercera divisiones del nervio trigémino fue resecada por vía extradural en un varón de 54 años. Las malformaciones de los nervios craneales son raras. Su origen específico en el nervio trigémino no ha sido descrito previamente.

Seventy-two patients submitted to meningioma surgery at Pedro Hispano Hospital from 1997 to 2001 were reviewed to analyze the association between size (largest diameter of the lesion obtained from imaging examinations) and other variables regarding the biological behavior and clinical outcome of these patients. Statistically significant association...

Se han revisado setenta y dos enfermos sometidos a cirugía de meningioma en el Hospital Pedro Hispano entre 1997 y 2001, para evaluar la asociación entre el tamaño (mayor diámetro de la lesión obtenido a partir de los exámenes de imagen) y otras variables concernientes a la caracterización y comportamiento de la lesión. Se han encontrado asociacion...

Se han revisado setenta y dos enfermos sometidos a cirugía de meningioma en el Hospital Pedro Hispano entre 1997 y 2001, para evaluar la asociación entre el tamaño (mayor diámetro de la lesión obtenido a partir de los exámenes de imagen) y otras variables concernientes a la caracterización y comportamiento de la lesión. Se han encontrado asociacion...

A case of conventional intramedullary osteosarcoma (epithelioid subtype) with 10 years of evolution and another of high grade surface osteosarcoma of the chondroblastic type, both in the skull, gave rise to several diagnostic and therapeutic difficulties. Key points concerning the definition, classification, imaging, clinical series data and treatm...

A doença de Moyamoya é uma doença cerebrovascular oclusiva crónica progressiva. O seu nome deriva da denominação japonesa para o aspecto esfumado característico na angiografia. A doença é frequente no continente asiático e rara na Europa. A etiologia é desconhecida, sendo proposta uma base hereditária. A chave do diagnóstico é a angiografia. O trat...

Six cases of cavernous abducens nerve schwannoma have been reported. A new case of a 39 year old female with abducens nerve paresis, exophtalmos, chemosis and headache due to a 1,36 x 2,58 cm cystic right cavernous abducens nerve schwannoma is presented and discussed. The cavernous sinus was opened between the trochlear and ophthalmic nerves. A por...

In this article we reviewed some examples of our experience in clinical applications of functional MRI (fMRI) in the motor and verbal fluency tasks evaluation. Seventeen patients with supratentorial cerebral pathology (5 arteriovenous malformations--AVMs, 2 meningiomas, 1 tuberculoma, 1 cortical tuberoma, 1 DNET, 2 cerebral metastases, 3 gliomas an...

In this article we reviewed some examples of our experience in clinical applications of functional MRI (fMRI) in the motor and verbal fluency tasks evaluation. Seventeen patients with supratentorial cerebral pathology (5 arteriovenous malformations--AVMs, 2 meningiomas, 1 tuberculoma, 1 cortical tuberoma, 1 DNET, 2 cerebral metastases, 3 gliomas an...

A ressonância magnética funcional (RMNf), técnica recente ainda em fase de evolução, que permite realizar o mapeamento cortical de forma não invasiva, revelando-se promissora no estudo de grande número de funções cerebrais. Objectivos: Avaliação do mapeamento cortical em doentes com epilepsia secundária a lesões cerebrais, incluídos no protocolo de...