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Biomedical subjects

A G Allut

Publications and source records attributed to A G Allut.

16 recordsLinked to original sources
PubMed2005

The Camino intracranial pressure device in clinical practice. Assessment in a 1000 cases.

BACKGROUND: Intracranial pressure (ICP) monitoring has become standard in the management of neurocritical patients. A variety of monitoring techniques and devices are available, each offering advantages and disadvantages. Analysis of large populations has never been performed. PATIENTS AND METHODS: A prospective study was designed to evaluate the Camino fiberoptic intraparenchymal cerebral pressure monitor for complications and accuracy. RESULTS: Between 1992-2004 one thousand consecutive patients had a fiberoptic ICP monitor placed. The most frequent indication for monitoring was severe head injury (697 cases). The average duration of ICP monitoring was 184.6 +/- 94.3 hours; the range was 16-581 hours. Zero drift (range, -17 to 21 mm Hg; mean 7.3 +/- 5.1) was recorded after the devices were removed from 624 patients. Mechanical complications such as: breakage of the optical fiber (n = 17); dislocations of the fixation screw (n = 15) or the probe (n = 13); and failure of ICP recording for unknown reasons (n = 4) were found in 49 Camino devices. CONCLUSIONS: The Camino ICP sensor remains one of the most popular ICP monitoring devices for use in critical neurosurgical patients. The system offers reliable ICP measurements in an acceptable percentage of device complications and the advantage of in vivo recalibration. The incidence of technical complications was low and similar to others devices.

Adolescent↗
PubMed1999

Primary anaplastic large cell lymphoma of the central nervous system.

Central nervous system (CNS) involvement is extremely rare in anaplastic large cell lymphoma (ALCL), and in children only isolated cases have been reported, mainly as secondary CNS involvement. A case of fatal primary ALCL of the brain in a 13-year-old white boy is reported. Magnetic resonance imaging of the brain showed decreased absorption in T1- and T2-weighted image showed a hyperintense signal in the right parietal lobe and 2 masses in the right frontal lobe. A frontal lobe biopsy showed a pleomorphic neoplasm diffusely infiltrating the brain parenchyma and composed of large cells with bizarre, often polylobated or horseshoe-shaped nuclei. Immunohistochemical stains showed diffuse strong positivity for CD30, anaplastic lymphoma kinase protein (ALK-1), p80, leucocyte common antigen, CD45RO (UCHL1), and focal staining for epithelial membrane antigen. Immunostainings for cytokeratins, monocyte-macrophage, and B-cell markers were negative. Epstein-Barr virus latent membrane protein was not detected. To the best of our knowledge, there is only 1 case of primary ALCL of the brain in childhood previously reported in the literature. Before the biopsy, both cases were clinically misdiagnosed as mycobacterial CNS infection. Therefore, primary ALCL should also be included in the differential diagnosis when a mycobacterial CNS infection is suspected in pediatric patients; a careful cytological evaluation of the cerebrospinal fluid or cerebral biopsy are essential for an accurate diagnosis.

Adolescent↗
PubMed1997

Acute bilateral extradural haematoma of the posterior cranial fossa.

Traumatic haematomas located in the posterior fossa are less frequent than those above the tentorium. Extradural haematomas are the most common type of haematomas in the posterior fossa and are usually unilateral. We present the case of a patient with a bilateral extradural haematomas of the posterior fossa and review eight cases previously reported in the literature.

Brain Concussion↗
PubMed1992

Sinus pericranii: radiological and etiopathological considerations. Case report.

Sinus pericranii is a rare vascular anomaly involving an abnormal communication between the extracranial and intracranial circulations. A case of frontal sinus pericranii is presented which appeared to be a posttraumatic sinus because it developed 2 years after a cranial injury. However, the presence of vascular endothelium in the pathological examination and its association with a vascular anomaly (persistent trigeminal artery) suggested a congenital origin. The lesion, pericranial blood sinuses, and bone were totally removed. The computerized tomography, angiography, and magnetic resonance imaging findings are presented. The literature is reviewed and the pathogenesis of sinus pericranii is discussed.

Adult↗
PubMed1990

Hydrocephalus and intraspinal tumor in childhood.

Hydrocephalus with spinal tumor is rare, and its cause is obscure. We report one patient with a thoracic astrocytoma who developed ventricular dilatation and intracranial hypertension. The pathophysiology is reviewed.

Astrocytoma↗
PubMedDate not supplied

[Cystic hemangioblastoma of the spinal bulb].

INTRODUCTION: Hemangioblastomas are histologically benign tumors that comprise 8%-12% of all posterior fossa lesions in the adult. Brain stem hemangioblastomas may be solid or cystic tumors, and surgical removal of these tumors is usually possible and is the optimal treatment. We describe a case of hemangioblastoma in the medulla oblongata diagnosed with MRI. Using microsurgery technic a total excision of this intramedullary tumor was performed. CLINICAL CASE: A 37-year-old woman with a 3-months history of progressive dysphagia and occipital headache. Neurological examination at the time of admission revealed bilateral horizontal nystagmus, paresis of cranial nerves IX, X and XII, motor weakness of the four extremities. A MRI revealed a cystic intramedullary tumor. Using a suboccipital craniectomy the tumor was totally removed. CONCLUSIONS: Cystic hemangioblastomas of the medulla oblongata represent a small segment in the spectrum of brain stem tumors. Surgical removal of these tumors can be accomplished successfully with a low risk of neurological injury.

Adult↗
PubMedDate not supplied

[De novo arachnoid cyst treated with a cystoperitoneal shunt].

INTRODUCTION: Arachnoid cysts (AC) are benign pathological structures that are typically found during childhood, and represent approximately 1% of all intracranial lesions. Unlike cases of secondary cysts with a known causation, which can be attributed to inflammatory processes or traumatic brain injuries, the causation of the primary cysts is unknown. In the cases reported to date, the cysts present from the first imaging study conducted, which is why they are considered to be of a prenatal origin. CASE REPORT: A boy who, at the age of 5 months, is found to have an AC of considerable dimensions that did not appear in a transfontanellar echographic study carried out for other reasons at the age of 2 months. CONCLUSION: The importance of this case lies in the fact that it has been possible to show the appearance of a cyst after birth in a sequence of images in the case of a pathology which, according to all the theories and tests, is considered to have a congenital causation.

Arachnoid Cysts↗