Brain and bone scans in primary Ewing's sarcoma of the petrous bone

1976 ◽  
Vol 44 (5) ◽  
pp. 608-612 ◽  
Author(s):  
Pete M. Fitzer ◽  
William R. Steffey
Keyword(s):  
Bone Scan ◽  
Ewing’S Sarcoma ◽  
Ewing's Sarcoma ◽  
Petrous Bone ◽  
Diagnosis And Treatment ◽  
Content Type ◽  
Brain Scan ◽  
Bone Scans ◽  
The Right ◽  
Fine Print

✓ The authors present a case in which primary Ewing's sarcoma of the right petrous pyramid in a 9-year-old girl showed no uptake on a 99mTc-pertechnetate nuclide angiogram. Intense uptake was present on a 99mTc-polyphosphate bone scan, but a static brain scan was only minimally abnormal. The diagnosis and treatment of Ewing's sarcoma are reviewed.

Traumatic false aneurysm of the superior cerebellar artery simulating posterior fossa tumor

1977 ◽  
Vol 46 (3) ◽  
pp. 377-380 ◽  
Author(s):  
H. Howard Cockrill ◽  
John P. Jimenez ◽  
John A. Goree
Keyword(s):  
Posterior Fossa ◽  
False Aneurysm ◽  
Superior Cerebellar Artery ◽  
Content Type ◽  
Specific Diagnosis ◽  
Cerebellar Artery ◽  
Brain Scan ◽  
The Right ◽  
Angiographic Findings ◽  
Fine Print

✓ An example of traumatic false aneurysm of the right superior cerebellar artery is described. The chronicity of the clinical picture and a positive brain scan strongly suggested a posterior fossa neoplasm; however, the angiographic findings permitted a specific diagnosis to be made.

Lymphomatoid granulomatosis apparently confined to one temporal lobe

1987 ◽  
Vol 67 (4) ◽  
pp. 612-615 ◽  
Author(s):  
Richard S. C. Kerr ◽  
J. T. Hughes ◽  
Trudi Blamires ◽  
Peter J. Teddy
Keyword(s):  
Macular Edema ◽  
Temporal Lobe ◽  
Cystoid Macular Edema ◽  
Lymphomatoid Granulomatosis ◽  
Diagnosis And Treatment ◽  
Pathological Findings ◽  
Content Type ◽  
The Right ◽  
Uncertain Etiology ◽  
Fine Print

✓ Lymphomatoid granulomatosis is of uncertain etiology and poses problems with diagnosis and treatment. A case with involvement of the right temporal lobe, but associated with cystoid macular edema of the retina, is described. The unusual mode of presentation, the radiographic, operative, and pathological findings, the response to surgery and radiotherapy, and the possible etiology are discussed.

Primary epidural Ewing's sarcoma presenting as a lumbar disc protrusion

1979 ◽  
Vol 51 (1) ◽  
pp. 120-123 ◽  
Author(s):  
Lawrence H. Fink ◽  
Michael W. Meriwether
Keyword(s):  
Epidural Space ◽  
Ewing’S Sarcoma ◽  
Ewing's Sarcoma ◽  
Lumbar Disc ◽  
Pertinent Literature ◽  
Disc Protrusion ◽  
Content Type ◽  
Primary Neoplasms ◽  
Spinal Epidural ◽  
Fine Print

✓ Primary neoplasms of the spinal epidural space are uncommon. One of the rarest of these is a soft tissue sarcoma indistinguishable from Ewing's sarcoma of the bone. Only 39 such cases have been reported previously, of which only three arose within the epidural space. The authors report an additional case, which presented in an atypical manner, and review the pertinent literature.

Trigeminal neuralgia secondary to asymmetry of the petrous bone

1970 ◽  
Vol 33 (5) ◽  
pp. 596-598 ◽  
Author(s):  
Sixto Obrador ◽  
Victor G. Queimadelos ◽  
Manuel Soto
Keyword(s):  
Trigeminal Neuralgia ◽  
Petrous Bone ◽  
Therapeutic Result ◽  
Basilar Impression ◽  
Content Type ◽  
History Of ◽  
Trigeminal Root ◽  
Extradural Approach ◽  
The Right ◽  
Fine Print

✓ This patient with a 12-year history of right trigeminal neuralgia had a marked asymmetry of the skull and petrous bone due to unilateral basilar impression of the right side. Partial section of the trigeminal root through a right subtemporal extradural approach was performed, with a good therapeutic result. Stretching and angulation of the root over the ridge of the elevated petrous bone was the probable cause of the trigeminal pain.

Localized primary intracranial Ewing's sarcoma of the orbital roof

1979 ◽  
Vol 50 (6) ◽  
pp. 811-813 ◽  
Author(s):  
Antonio Alvarez-Berdecia ◽  
Luis Schut ◽  
Derek A. Bruce
Keyword(s):  
Ewing’S Sarcoma ◽  
Clinical Presentation ◽  
Ewing's Sarcoma ◽  
Intracranial Extension ◽  
X Rays ◽  
Content Type ◽  
Orbital Roof ◽  
The Right ◽  
Tomography Scan

✓ A rare case of a primary Ewing's sarcoma arising from the intracranial portion of the right orbital roof is presented. Clinical presentation was that of a rapidly growing tender exostosis, associated with headaches. History indicated that the tumor may have been present for more than 1 year. Skull x-rays showed marked diastasis of the coronal suture and a “mottled” appearance on the right frontal bone suggestive of a sarcoma. Bone scan further confirmed the presence of a malignant bone tumor. Computerized tomography scan showed the intracranial extension of the tumor and a follow-up scan allowed us to see the response of the tumor to therapy. Only two other cases with details as to intracranial localization were found in the literature.

En bloc petrosectomy using a Gigli saw for petroclival lesions

1995 ◽  
Vol 83 (3) ◽  
pp. 559-560 ◽  
Author(s):  
Tomio Sasaki ◽  
Makoto Taniguchi ◽  
Ichiro Suzuki ◽  
Takaaki Kirino
Keyword(s):  
Facial Nerve ◽  
Semicircular Canals ◽  
Petrous Bone ◽  
New Technique ◽  
En Bloc ◽  
Content Type ◽  
A New Technique ◽  
Transtentorial Approach ◽  
Fine Print

✓ The authors report a new technique for en bloc petrosectomy using a Gigli saw as an alternative to drilling the petrous bone in the combined supra- and infratentorial approach or the transpetrosal—transtentorial approach. It is simple and easy and avoids postoperative cosmetic deformity. This technique has been performed in 11 petroclival lesions without injuring the semicircular canals, the cochlea, or the facial nerve.

Malignant astrocytoma following radiotherapy of a craniopharyngioma

1978 ◽  
Vol 48 (4) ◽  
pp. 622-627 ◽  
Author(s):  
Richard L. Sogg ◽  
Sarah S. Donaldson ◽  
Craig H. Yorke
Keyword(s):  
Experimental Evidence ◽  
Temporal Lobe ◽  
Malignant Astrocytoma ◽  
Content Type ◽  
Suprasellar Region ◽  
The Right ◽  
Fine Print

✓ A 9-year-old schoolgirl received 6007 rads to the suprasellar region for craniopharyngioma. Five years later, a malignant astrocytoma developed in the right temporal lobe. We cite clinical and experimental evidence to support our suspicion that the glioma may have been induced by radiation.

A new rat model of chronic cerebral hypoperfusion associated with arteriovenous malformations

2002 ◽  
Vol 97 (5) ◽  
pp. 1198-1202 ◽  
Author(s):  
Jian Hai ◽  
Meixiu Ding ◽  
Zhilin Guo ◽  
Bingyu Wang
Keyword(s):  
Electron Microscopy ◽  
Animal Model ◽  
Arteriovenous Malformations ◽  
Perfusion Pressure ◽  
Chronic Cerebral Hypoperfusion ◽  
Cerebral Hypoperfusion ◽  
Model Group ◽  
Content Type ◽  
The Right ◽  
Fine Print

Object. A new experimental model of chronic cerebral hypoperfusion was developed to study the effects of systemic arterial shunting and obstruction of the primary vessel that drains intracranial venous blood on cerebral perfusion pressure (CPP), as well as cerebral pathological changes during restoration of normal perfusion pressure. Methods. Twenty-four Sprague—Dawley rats were randomly assigned to either a sham-operated group, an arteriovenous fistula (AVF) group, or a model group (eight rats each). The animal model was readied by creating a fistula through an end-to-side anastomosis between the right distal external jugular vein (EJV) and the ispilateral common carotid artery (CCA), followed by ligation of the left vein draining the transverse sinus and bilateral external carotid arteries. Systemic mean arterial pressure (MAP), draining vein pressure (DVP), and CPP were monitored and compared among the three groups preoperatively, immediately postoperatively, and again 90 days later. Following occlusion of the fistula after a 90-day interval, blood—brain barrier (BBB) disruption and water content in the right cortical tissues of the middle cerebral artery territory were confirmed and also quantified with transmission electron microscopy. Formation of a fistula resulted in significant decreases in MAP and CPP, and a significant increase in DVP in the AVF and model groups. Ninety days later, there were still significant increases in DVP and decreases in CPP in the model group compared with the other groups (p < 0.05). Damage to the BBB and brain edema were noted in animals in the model group during restoration of normal perfusion pressure by occlusion of the fistula. Electron microscopy studies revealed cerebral vasogenic edema and/or hemorrhage in various amounts, which correlated with absent astrocytic foot processes surrounding some cerebral capillaries. Conclusions. The results demonstrated that an end-to-side anastomosis between the distal EJV and CCA can induce a decrease in CPP, whereas a further chronic state of cerebral hypoperfusion may be caused by venous outflow restriction, which is associated with perfusion pressure breakthrough. This animal model conforms to the basic hemodynamic characteristics of human cerebral arteriovenous malformations.

Cerebrovascular characterization of clazosentan, the first nonpeptide endothelin receptor antagonist clinically effective for the treatment of cerebral vasospasm. Part I: Inhibitory effect on endothelinA receptor—mediated contraction

2005 ◽  
Vol 102 (6) ◽  
pp. 1101-1107 ◽  
Author(s):  
Hartmut Vatter ◽  
Michael Zimmermann ◽  
Veronika Tesanovic ◽  
Andreas Raabe ◽  
Lothar Schilling ◽  
...  
Keyword(s):  
Receptor Antagonist ◽  
Cerebral Vasospasm ◽  
Isometric Force ◽  
Inhibitory Effect ◽  
Affinity Constant ◽  
Dependent Manner ◽  
Content Type ◽  
The Right ◽  
Fine Print

Object. The central role of endothelin (ET)—1 in the development of cerebral vasospasm after subarachnoid hemorrhage is indicated by the successful treatment of this vasospasm in several animal models by using selective ETA receptor antagonists. Clazosentan is a selective ETA receptor antagonist that provides for the first time clinical proof that ET-1 is involved in the pathogenesis of cerebral vasospasm. The aim of the present investigation was, therefore, to define the pharmacological properties of clazosentan that affect ETA receptor—mediated contraction in the cerebrovasculature. Methods. Isometric force measurements were performed in rat basilar artery (BA) ring segments with (E+) and without (E−) endothelial function. Concentration effect curves (CECs) were constructed by cumulative application of ET-1 or big ET-1 in the absence or presence of clazosentan (10−9, 10−8, and 10−7 M). The inhibitory potency of clazosentan was determined by the value of the affinity constant (pA2). The CECs for contraction induced by ET-1 and big ET-1 were shifted to the right in the presence of clazosentan in a parallel dose-dependent manner, which indicates competitive antagonism. The pA2 values for ET-1 were 7.8 (E+) and 8.6 (E−) and the corresponding values for big ET-1 were 8.6 (E+) and 8.3 (E−). Conclusions. The present data characterize clazosentan as a potent competitive antagonist of ETA receptor—mediated constriction of the cerebrovasculature by ET-1 and its precursor big ET-1. These functional data may also be used to define an in vitro profile of an ET receptor antagonist with a high probability of clinical efficacy.

Brain-stem hemangioma calcificans

1983 ◽  
Vol 59 (1) ◽  
pp. 150-152 ◽  
Author(s):  
Michele Occhiogrosso ◽  
Aristide Carella ◽  
Paola D'aprile ◽  
Giacomo Vailati
Keyword(s):  
Brain Stem ◽  
Cavernous Hemangioma ◽  
Diagnosis And Treatment ◽  
Review Of The Literature ◽  
Content Type ◽  
Fine Print

✓ A case of brain-stem hemangioma calcificans is described. The few cases reported in the literature prove the rarity of this tumor, which is considered a benign variant of cerebral cavernous hemangioma. Diagnosis and treatment of these tumors are briefly discussed with a review of the literature including 11 previous cases.

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