Intracranial parenchymal schwannoma

1993 ◽  
Vol 79 (2) ◽  
pp. 217-222 ◽  
Author(s):  
Gian Piero Casadei ◽  
Takashi Komori ◽  
Bernd W. Scheithauer ◽  
Gary M. Miller ◽  
Joseph E. Parisi ◽  
...  
Keyword(s):  
Parietal Lobe ◽  
Clinical Course ◽  
Cystic Degeneration ◽  
Resonance Imaging ◽  
Imaging Studies ◽  
Content Type ◽  
Imaging Characteristics ◽  
Benign Nature ◽  
Peripheral Enhancement

✓ The clinical, radiological, and pathological features of nine cases of intracranial parenchymal schwannoma are described. The clinical course in four patients 23 years of age or younger mirrored the indolent nature of this neoplasm. Imaging studies included computerized tomography in eight patients and magnetic resonance imaging in three. The lesions were well demarcated with only mild surrounding edema. Five tumors were deep within the temporoparieto-occipital region, three were in the cerebellum, and one lay peripherally in the parietal lobe. Over two-thirds of the nine tumors were either cystic (five) or contained areas of cystic degeneration (two). One lesion was frankly hemorrhagic. A variety of imaging characteristics and contrast enhancement patterns were observed, including those of a cyst with a mural nodule and peripheral enhancement. Of the four solid neoplasms, two enhanced homogeneously while the other two demonstrated heterogeneous enhancement. Six tumors were resected totally. The follow-up period ranging from 2 months to 2 years has shown no recurrences. Microscopically, immunohistochemically, and ultrastructurally, the tumors were indistinguishable from peripheral schwannomas. A possible mechanism underlying the histogenesis of these rare lesions is discussed. The importance of recognizing this tumor is stressed, particularly in younger patients, given its benign nature, radiological resemblance to other tumors such as pilocytic astrocytoma, and favorable response to resection.

Primary embryonal-cell carcinoma of the parietal lobe

1991 ◽  
Vol 75 (3) ◽  
pp. 468-471 ◽  
Author(s):  
Robin F. Koeleveld ◽  
Alan R. Cohen
Keyword(s):  
Cell Carcinoma ◽  
Parietal Lobe ◽  
Germ Cell Tumors ◽  
Review Of The Literature ◽  
Resonance Imaging ◽  
Content Type ◽  
Imaging Characteristics ◽  
Intracranial Germ Cell Tumors ◽  
Embryonal Cell Carcinoma ◽  
Fine Print

✓ A case of primary embryonal-cell carcinoma of the parietal lobe is reported. The unusually chronic presentation of such a malignant tumor is described. The atypical computerized tomography and magnetic resonance imaging characteristics of this lesion are presented. Review of the literature yielded no previous reports of a lobar embryonal-cell carcinoma. The rarity of intracranial germ-cell tumors presenting off the midline is discussed.

Initial experience with gamma knife surgery for endocrine ophthalmopathy

2005 ◽  
Vol 102 ◽  
pp. 272-275
Author(s):  
Julio C. Antico ◽  
Luis Crovetto ◽  
Eduardo Tenca ◽  
Carlos Artes
Keyword(s):  
Gamma Knife ◽  
Gamma Knife Surgery ◽  
Resonance Imaging ◽  
Imaging Studies ◽  
Content Type ◽  
Soft Tissue Involvement ◽  
Endocrine Ophthalmopathy ◽  
A Prospective Study ◽  
Fine Print

Object. The aim of this study was to evaluate both the effectiveness and safety of the treatment of endocrine ophthalmopathy with gamma knife surgery (GKS). Methods. Five patients were included in a prospective study designed to assess the results of GKS of endocrine ophthalmopathy secondary to Graves disease. All the patients completed a 2-year follow-up period. During this period, the patients were evaluated both clinically and by means of additional methods, including computerized tomography and magnetic resonance imaging studies. The minimum dose delivered to the 50% isodose line was 6.5 Gy in all the patients. In all cases, a clinical improvement was observed. The best effect was seen in symptom regression related to soft-tissue involvement. No treatment-related side effects were detected. Conclusions. In light of the results obtained the authors consider that GKS may be a safe and effective way to treat endocrine ophthalmopathy.

Treatment and prevention of tethered and retethered spinal cord using a Gore-Tex surgical membrane

1994 ◽  
Vol 80 (4) ◽  
pp. 689-693 ◽  
Author(s):  
Hiroshi K. Inoue ◽  
Satoshi Kobayashi ◽  
Katsumi Ohbayashi ◽  
Hideaki Kohga ◽  
Masaru Nakamura
Keyword(s):  
Spinal Cord ◽  
Spinal Dysraphism ◽  
Tethered Cord ◽  
New Method ◽  
Resonance Imaging ◽  
Imaging Studies ◽  
Content Type ◽  
Follow Up Study ◽  
Treatment And Prevention

✓ The incidence of the tethered cord syndrome after repair of spinal dysraphism is not insignificant. A retethered spinal cord may also develop after an untethering operation. In order to treat and/or prevent the tethered and retethered spinal cord, the authors developed and successfully used a new method in 12 cases. After complete release and reconstruction of the spinal cord, a Gore-Tex surgical membrane was placed over the cord and fixed to the lateral dural surface with stay sutures. During a postoperative follow-up period ranging from 23 months to 7 years, no further neurological deterioration was observed in the 12 patients and magnetic resonance imaging studies showed no adhesion of the spinal cord to the operative site. It is concluded that this simple new method is effective for the treatment and prevention of tethering and/or retethering of the spinal cord, although a longer follow-up study is required.

Initial experience with gamma knife surgery for endocrine ophthalmopathy

2005 ◽  
Vol 102 (Special_Supplement) ◽  
pp. 272-275
Author(s):  
Julio C. Antico ◽  
Luis Crovetto ◽  
Eduardo Tenca ◽  
Carlos Artes
Keyword(s):  
Gamma Knife ◽  
Gamma Knife Surgery ◽  
Resonance Imaging ◽  
Imaging Studies ◽  
Content Type ◽  
Soft Tissue Involvement ◽  
Endocrine Ophthalmopathy ◽  
A Prospective Study ◽  
Fine Print

Object. The aim of this study was to evaluate both the effectiveness and safety of the treatment of endocrine ophthalmopathy with gamma knife surgery (GKS). Methods. Five patients were included in a prospective study designed to assess the results of GKS of endocrine ophthalmopathy secondary to Graves disease. All the patients completed a 2-year follow-up period. During this period, the patients were evaluated both clinically and by means of additional methods, including computerized tomography and magnetic resonance imaging studies. The minimum dose delivered to the 50% isodose line was 6.5 Gy in all the patients. In all cases, a clinical improvement was observed. The best effect was seen in symptom regression related to soft-tissue involvement. No treatment-related side effects were detected. Conclusions. In light of the results obtained the authors consider that GKS may be a safe and effective way to treat endocrine ophthalmopathy.

scholarly journals Pediatric Peritoneal Epithelial Malignant Mesothelioma Case Report

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Elizabeth Bellew ◽  
Samantha Lee ◽  
Hiren Patel ◽  
Carolyn Fein Levy ◽  
Rachelle Goldfisher ◽  
...  
Keyword(s):  
Case Report ◽  
Malignant Mesothelioma ◽  
Crucial Role ◽  
Clinical Course ◽  
Pediatric Population ◽  
Adult Population ◽  
Initial Evaluation ◽  
Peritoneal Mesothelioma ◽  
Imaging Characteristics

We present a 14-year-old boy with peritoneal epithelial malignant mesothelioma (PEMM). While pathology is required to make this diagnosis, radiology plays a crucial role throughout the clinical course of this disease. The key imaging characteristics of peritoneal mesothelioma have been previously well-described in the adult population, but there are rare reports in the pediatric population. This pediatric report highlights the multidimensional use of imaging in this disease, from the initial evaluation to therapeutic supplementation and subsequent follow-up.

Neglected Scaphocapitate Syndrome

2021 ◽  
Author(s):  
Assaf Kadar ◽  
Sorin D. Iordache
Keyword(s):  
Avascular Necrosis ◽  
Vascular Supply ◽  
Vascular Studies ◽  
Resonance Imaging ◽  
Proximal Pole ◽  
Imaging Studies ◽  
Anatomical Reduction ◽  
Rare Injury ◽  
To Receive

Abstract Background Scaphocapitate syndrome is a rare injury where the proximal pole of the capitate rotates 90 to 180 degrees. The proximal pole of the capitate, thought to receive its vascular supply retrograde, is rendered avascular in such cases. However, recent evidence of low rates of avascular necrosis in displaced capitate fractures, and new vascular studies of the capitate, challenge this paradigm. Case Description We report a case of a missed and neglected scaphocapitate syndrome with more than 30 years follow-up. While the patient experienced midcarpal arthritis, the injury had not resulted in capitate proximal pole avascular necrosis as per T1 magnetic resonance imaging studies. Literature Review Missed and chronic cases of scaphocapitate syndrome were reported previously. Successful outcomes were achieved with anatomical reduction in cases without midcarpal arthritis. Salvage procedures or arthroplasty procedures are recommended with the presence of midcarpal arthritis. However, there are no reports of a neglected case with more than 30 years follow-up with preserved vascularity of the proximal pole of the capitate. Clinical Relevance This case illustrates that vascularity of the proximal pole of the capitate can be preserved even in longstanding displaced fractures.

scholarly journals Relation of FTO to BOLD response to receipt and anticipated receipt of food and monetary reward, food images, and weight gain in healthy weight adolescents

2019 ◽  
Vol 15 (10) ◽  
pp. 1135-1144 ◽  
Author(s):  
Eric Stice ◽  
Sonja Yokum ◽  
Pascale Voelker
Keyword(s):  
Weight Gain ◽  
Body Mass ◽  
Parietal Lobe ◽  
Monetary Reward ◽  
Healthy Weight ◽  
Palatable Food ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Food Images

Abstract Although the fat mass and obesity-associated gene (FTO) correlates with elevated body mass, it is unclear how it contributes to overeating. We tested if individuals with the A allele show greater reward region responsivity to receipt and anticipated receipt of food and money and palatable food images. We also tested if these individuals show greater future weight gain. Initially healthy weight adolescents (Study 1, N = 162; Study 2, N = 135) completed different functional magnetic resonance imaging paradigms and had their body mass measured annually over 3 years. Adolescents with the AA or AT genotypes showed less precuneus and superior parietal lobe response and greater cuneus and prefrontal cortex response to milkshake receipt and less putamen response to anticipated milkshake receipt than those with the TT genotype in separate analyses of each sample. Groups did not differ in response to palatable food images, and receipt and anticipated receipt of money, or in weight gain over 3-year follow-up. Results suggest that initially healthy weight adolescents with vs without the FTO A allele show differential responsivity to receipt and anticipated receipt of food but do not differ in neural response to palatable food images and monetary reward and do not show greater future weight gain.

Natural course of unoperated intracranial arteriovenous malformations: study of 50 cases

1989 ◽  
Vol 71 (6) ◽  
pp. 805-809 ◽  
Author(s):  
Youichi Itoyama ◽  
Syouzaburou Uemura ◽  
Yukitaka Ushio ◽  
Jun-Ichi Kuratsu ◽  
Nobuhito Nonaka ◽  
...  
Keyword(s):  
Arteriovenous Malformations ◽  
Poor Prognosis ◽  
Clinical Course ◽  
Initial Symptom ◽  
Intracranial Arteriovenous Malformations ◽  
Good Clinical Outcome ◽  
Content Type ◽  
Initial Rupture ◽  
High Incidence

✓ The clinical course of 50 patients with conservatively treated intracranial arteriovenous malformations (AVM's) was followed, most of them for more than 5 years. The average follow-up period was 13.4 years. The initial symptom was intracranial bleeding in 29 patients (58%) and seizure in 15 patients (30%). Small and deep-seated AVM's were associated with a high incidence of bleeding; however, repeated hemorrhages were not necessarily indicative of a poor prognosis. Children younger than 15 years had a better prognosis than adults. There was no correlation between pregnancy and bleeding. In the hemorrhage group, the incidence of rebleeding was 6.9% in the 1st year after initial rupture, 1.91% per year after 5 years, and 0.92% per year after 15 years. The overall incidence of rebleeding was 34.5% in the hemorrhage group. Of the 50 patients, 37 (74%) had a good clinical outcome, four (8%) had a fair outcome, and four (8%) had a poor outcome; five patients died.

Fibromatosis: a potential sequela of neuromuscular choristoma

2012 ◽  
Vol 116 (2) ◽  
pp. 399-408 ◽  
Author(s):  
Marie-Noëlle Hébert-Blouin ◽  
Bernd W. Scheithauer ◽  
Kimberly K. Amrami ◽  
Susan R. Durham ◽  
Robert J. Spinner
Keyword(s):  
Mayo Clinic ◽  
Aggressive Fibromatosis ◽  
Extensive Literature ◽  
Nerve Lesion ◽  
Imaging Studies ◽  
Lower Intensity ◽  
Imaging Characteristics ◽  
Collagenous Tissue ◽  
Muscle Nerve

Object Neuromuscular choristoma (NMC) is a rare peripheral nerve lesion in which mature skeletal muscle fibers lie within the nerve and its fascicles. Given limited follow-up, its natural history is poorly understood. The occurrence of aggressive fibromatosis in one of the authors' patients and its occurrence in reported cases suggests an etiological relationship between the 2 lesions. This study attempts to explain the association and its frequency. Methods All cases of NMCs seen in consultation or treated at the Mayo Clinic were identified. Demographic and clinical data were reviewed in cases with coexistent aggressive fibromatosis. Pathology and neuroimaging studies were reexamined. In addition, an extensive literature review was performed to explore the association of NMC with aggressive fibromatosis, with special attention given to pathological and imaging characteristics and the development of aggressive fibromatosis. Results The authors identified 10 patients with a diagnosis of NMC who were treated at the Mayo Clinic between 1992 and 2010. Four of 5 with adequate follow-up had developed a definite or suspected aggressive fibromatosis. A review of the initial pathological specimens in these cases revealed no evidence of fibromatosis, but all of the lesions exhibited accompanying hypocellular collagenous tissue. On MR images, all cases showed areas of low signal intensity, which significantly differed from muscle, nerve, and NMC components. On available serial MR imaging studies, aggressive fibromatosis seemed to originate in such lower-intensity regions. In the 18 previously reported cases of NMC, 5 patients developed recurrent masses diagnosed as either definite (2 cases) or possible (3 cases) fibromatosis. Review of the published imaging studies in these cases suggests the presence of lower intensity areas similar to those observed in the 10 patients treated at the Mayo Clinic. Conclusions This study confirms that the development of aggressive fibromatosis in patients with NMC has been underreported. A direct relationship between the NMC and the development of aggressive fibromatosis is suggested by pathological and neuroimaging evidence.

A Tour of the Thymus: A Review of Thymic Lesions with Radiologic and Pathologic Correlation

2015 ◽  
Vol 66 (1) ◽  
pp. 5-15 ◽  
Author(s):  
Alan J. Goldstein ◽  
Isabel Oliva ◽  
Hedieh Honarpisheh ◽  
Ami Rubinowitz
Keyword(s):  
Imaging Studies ◽  
Dynamic Changes ◽  
Cross Sectional ◽  
Radiographic Diagnosis ◽  
Imaging Characteristics ◽  
Pathologic Features ◽  
Cross Sectional Imaging ◽  
Pathologic Lesions ◽  
Periods Of Stress

The thymus is routinely encountered on cross-sectional imaging studies of the chest. It has a variable appearance, undergoes dynamic changes during periods of stress, and demonstrates numerous different pathologic lesions. Understanding the imaging characteristics of these different lesions facilitates accurate radiographic diagnosis and can prevent unnecessary follow-up imaging and intervention. This article will review normal thymic anatomy and development, thymic hyperplasia and associated medical conditions, and the imaging and pathologic features of various benign and malignant thymic lesions.

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