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1.
Clin Radiol ; 68(11): e561-9, 2013 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-23835404

RESUMO

AIM: To evaluate factors related to the technical and haemostatic outcomes of endovascular management in patients with head and neck cancers (HNC) associated with carotid blowout syndrome (CBS) of the external carotid artery (ECA). MATERIALS AND METHODS: Between 2002 and 2011, 34 patients with HNC with CBS involving branches of the ECA underwent endovascular therapy. Treatment included embolization with microparticles, microcoils, or acrylic adhesives. Fisher's exact test was used to examine demographic features, clinical and angiographic severities, and clinical and imaging findings as predictors of endovascular management outcomes. RESULTS: Technical success and immediate haemostasis were achieved in all patients. Technical complications were encountered in one patient (2.9%). Rebleeding occurred in nine patients (26.5%). Angiographic vascular disruption grading from slight (1) to severe (4) revealed that the 18 patients with acute CBS had scores of 2 (2/18, 11.1%), 3 (3/18, 16.7%), and 4 (13/18, 72.2%). The 16 patients with impending and threatened CBS had scores of 1 (1/16, 6.25%), 2 (5/16, 31.25%), and 3 (10/16, 62.5%; p = 0.0003). For the 25 patients who underwent preprocedural computed tomography (CT)/magnetic resonance imaging (MRI) examinations within 3 months of treatment, the agreement between clinical and imaging findings reached the sensitivity, specificity, and kappa values for recurrent tumours (1, 0.7143, 0.7826), soft-tissue defect (0.9091, 0.3333, 0.2424), and sinus tract/fistula (0.4737, 0, 0.4286). CONCLUSION: Endovascular management for patients with CBS of the ECA had high technical success and safety but was associated with high rebleeding rates. We suggest applying aggressive post-procedural follow-up and using preprocedural CT/MRI to enhance the periprocedural diagnosis.


Assuntos
Doenças das Artérias Carótidas/complicações , Doenças das Artérias Carótidas/terapia , Artéria Carótida Externa/diagnóstico por imagem , Artéria Carótida Externa/patologia , Embolização Terapêutica/métodos , Neoplasias de Cabeça e Pescoço/complicações , Adulto , Idoso , Meios de Contraste , Feminino , Seguimentos , Humanos , Aumento da Imagem/métodos , Imageamento por Ressonância Magnética/métodos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Ruptura Espontânea/complicações , Ruptura Espontânea/terapia , Tomografia Computadorizada por Raios X/métodos , Resultado do Tratamento
2.
J Neurol Neurosurg Psychiatry ; 82(7): 823-5, 2011 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-20587480

RESUMO

OBJECTIVES: To test the hypothesis that vertebral artery hypoplasia (VAH) may affect the lateralisation of vestibular neuropathy (VN), probably through haemodynamic effect on the vestibular labyrinth. METHODS: 69 patients with unilateral VN were examined with a magnetic resonance angiographic (MRA) and caloric test. 50 healthy subjects served as controls. The diagnosis of intracranial VAH was based on MRA if <0.22 cm in VA diameter and a diameter asymmetry index >40%. The authors then correlated the canal paretic side with the VAH side. RESULTS: MRA study revealed 29 VAH (right/left: 23/6) in VN subjects and six VAH in controls (right/left: 5/1). The RR of VAH in VN subjects compared with controls was elevated (RR=2.2; 95% CI 1.8 to 2.8). There was a high accordance rate between the side of VAH and VN. Among 29 patients with unilateral VAH, 65.5% (N=19) had an ipsilateral VN, in which left VAH showed a higher accordance rate (83.3%) than the right side (60.9%). VN subjects with vascular risk factors also had a higher VAH accordance rate (81%) than those without (25%). CONCLUSIONS: VAH may serve as a regional haemodynamic negative contributor and impede blood supply to the ipsilateral vestibular labyrinth, contributing to the development of VN, which could be enhanced by atherosclerotic risk factors and the left-sided location.


Assuntos
Artéria Vertebral/patologia , Neuronite Vestibular/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Testes Calóricos , Método Duplo-Cego , Meato Acústico Externo/patologia , Orelha Interna/irrigação sanguínea , Orelha Interna/patologia , Feminino , Lateralidade Funcional/fisiologia , Humanos , Isquemia/etiologia , Isquemia/patologia , Angiografia por Ressonância Magnética , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Vestíbulo do Labirinto/irrigação sanguínea , Vestíbulo do Labirinto/patologia
3.
J Endocrinol Invest ; 34(1): 53-9, 2011 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-20530987

RESUMO

OBJECTIVES: To identify mutations in the KAL1, the KAL2, and PROKR2/PROK2 genes and to characterize phenotypic features in 5 Chinese subjects with Kallmann Syndrome (KS) and 6 subjects with normosmic hypogonadotrophic hypogonadism (NHH) in Taiwan. DESIGN AND PATIENTS: Five unrelated males (age range 22-52 yr) with clinical manifestations of KS and 6 unrelated males (age range 24-47 yr) with NHH were analyzed. In addition, 5 relatives of KS subjects were also evaluated. Genomic DNA extraction, PCR, and DNA sequence analyses were performed using standard procedures. RESULTS: The 1st patient had a single missense mutation in his copy of the KAL1 gene, a T→G transversion in codon 134 that results in replacement of cysteine by gly cine. The 2nd affected subject had a single missense mutation in the KAL1 gene, a T→C transition in codon 163 that results in replacement of cysteine by arginine. The 3rd case was hemizygous for a nonsense mutation in codon 424 of exon 9 (c.CGA→TGA) of the KAL1 gene. This mutation predicts a markedly truncated protein. Two of the mutations (p.C134G and p.C163R) we identified in the KAL1 gene are novel. CONCLUSIONS: We identified 3 mutations, including 2 novel mutations, in the KAL1 gene in patients with KS in Taiwan. These data extend the variety of KAL1 gene mutations in KS and further define the role of the KAL1 protein in olfactory bulb development.


Assuntos
Povo Asiático/genética , Proteínas da Matriz Extracelular/genética , Síndrome de Kallmann/genética , Mutação de Sentido Incorreto , Proteínas do Tecido Nervoso/genética , Adulto , Estudos de Casos e Controles , Feminino , Hormônios Gastrointestinais/genética , Mutação em Linhagem Germinativa , Humanos , Síndrome de Kallmann/diagnóstico por imagem , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Mutação de Sentido Incorreto/fisiologia , Neuropeptídeos/genética , Bulbo Olfatório/diagnóstico por imagem , Radiografia , Receptor Tipo 1 de Fator de Crescimento de Fibroblastos/genética , Receptores Acoplados a Proteínas G/genética , Receptores de Peptídeos/genética , Adulto Jovem
4.
Cephalalgia ; 30(3): 354-9, 2010 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-19624687

RESUMO

Reversible cerebral vasoconstriction syndromes (RCVS) occur predominantly in middle-aged women. Only one child with RCVS has ever been reported. We report three boys (aged 10, 16 and 10 years) who had multiple thunderclap headaches, including one boy with bath-related attacks. None of them had secondary causes. All their magnetic resonance angiography demonstrated reversible cerebral vasoconstrictions of the major arteries with increased cerebral blood flow velocities on transcranial colour-coded sonography studies. Two of the three had hypertensive surges during headache attacks. None of the three boys had seizure, stroke or other neurological deficits. However, a left occipital subcortical lesion of unknown nature was noted in one boy. The efficacy of calcium channel blockers was variable in these three boys. This report suggests that, although rare, RCVS should be considered in paediatric patients if they present with a history of multiple attacks of thunderclap headache.


Assuntos
Transtornos da Cefaleia Primários/diagnóstico por imagem , Transtornos da Cefaleia Primários/fisiopatologia , Angiografia por Ressonância Magnética , Vasoespasmo Intracraniano/diagnóstico por imagem , Vasoespasmo Intracraniano/fisiopatologia , Adolescente , Fatores Etários , Angiografia Cerebral , Circulação Cerebrovascular/fisiologia , Criança , Transtornos da Cefaleia Primários/etiologia , Humanos , Masculino , Ultrassonografia , Vasoconstrição/fisiologia , Vasoespasmo Intracraniano/complicações
5.
Cephalalgia ; 28(6): 653-7, 2008 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-18422723

RESUMO

Our previous study demonstrated that heavily T2-weighted magnetic resonance (MR) myelography could successfully detect abnormal cerebrospinal fluid (CSF) collections in patients with spontaneous intracranial hypotension (SIH); however, its ability to demonstrate ongoing CSF leakage sites is uncertain. Currently, computed tomographic (CT) myelography is still considered the study of choice for such a purpose. In this study, we compared the results of the two imaging modalities in two patients with SIH. CSF leakages, such as C1-2 extraspinal collections, CSF along nerve root sleeves, and epidural fluid collections were noted on both studies with minor discrepancies. CSF collection along nerve root sleeves demonstrated by MR myelography was the most likely ongoing leakage site in comparison with CT myelography. Targeted epidural blood patches in both patients resulted in complete headache resolution. Non-invasive, non-contrasted and time-saving MR myelography is a promising study for patients with SIH. Further large-scale validation studies are needed.


Assuntos
Hipertensão Intracraniana/diagnóstico por imagem , Hipertensão Intracraniana/patologia , Imageamento por Ressonância Magnética/métodos , Mielografia/métodos , Derrame Subdural/diagnóstico por imagem , Derrame Subdural/patologia , Tomografia Computadorizada por Raios X/métodos , Adulto , Líquido Cefalorraquidiano/citologia , Líquido Cefalorraquidiano/diagnóstico por imagem , Feminino , Humanos , Hipertensão Intracraniana/complicações , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Derrame Subdural/complicações
6.
Cephalalgia ; 28(5): 524-30, 2008 May.
Artigo em Inglês | MEDLINE | ID: mdl-18318749

RESUMO

We consecutively recruited 21 patients (all women, mean 54 +/- 8 years) with bath-related thunderclap headache (BRTH). Thirteen of them were in menopause, two had just ceased hormonal therapy, and one was at 3 months postpartum. Bathing was the initial trigger for thunderclap headaches in nine patients (43%). Many patients (n = 15, 71%) had other non-bath-related attacks. Most patients (n = 18, 86%) reported that the headache occurred immediately when water was sprayed over their body, with warm water (52%) as the most common. During the disease course [mean 14 days (6-34)], the mean number of BRTH was 5.1 +/- 3.6 attacks. Nineteen patients (90%) changed bathing habits to prevent attacks. Thirteen patients (62%) had magnetic resonance angiography vasoconstrictions, and two of them (15%) developed reversible posterior encephalopathy. None of the patients without vasoconstrictions had this complication. Nimodipine was effective in stopping further attacks in 84% (16/19) treated patients. No relapse was reported at a mean follow-up of 30 months. BRTH occurred exclusively in women and predominantly in middle age. Deficiency or fluctuation of female sex hormones may play a role. About 60% patients showed cerebral vasospasms, fulfilling the diagnosis of reversible cerebral vasoconstriction syndrome and indicating a risk of posterior encephalopathy.


Assuntos
Banhos/efeitos adversos , Transtornos da Cefaleia Primários/diagnóstico , Transtornos da Cefaleia Primários/etiologia , Humanos , Masculino , Pessoa de Meia-Idade
7.
Cephalalgia ; 27(12): 1413-7, 2007 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-17888012

RESUMO

Spontaneous intracranial hypotension (SIH) associated with subarachnoid haemorrhage (SAH) has never been reported. Here, we report on a case of a 33-year-old woman with SIH, who developed simple partial sensory seizures 3 weeks later. Neuroimaging studies, including brain computed tomography and angiography, were initially normal, but revealed an isolated cortical venous thrombosis at 3 weeks. One week later, brain magnetic resonance imaging showed SAH around the thrombosed cortical vein. We postulate that the decline in the venous blood flow velocity due to SIH may have resulted in cortical venous thrombosis, which in turn led to rupture of the vessel wall and SAH in this patient.


Assuntos
Veias Cerebrais/patologia , Transtornos Cerebrovasculares/diagnóstico , Hipotensão Intracraniana/diagnóstico , Convulsões/diagnóstico , Hemorragia Subaracnóidea/diagnóstico , Trombose Venosa/diagnóstico , Adulto , Transtornos Cerebrovasculares/complicações , Feminino , Humanos , Hipotensão Intracraniana/complicações , Convulsões/complicações , Hemorragia Subaracnóidea/complicações , Trombose Venosa/complicações
8.
AJNR Am J Neuroradiol ; 28(1): 181-8, 2007 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-17213454

RESUMO

BACKGROUND AND PURPOSE: Some reports of reconstructive management of carotid blowout syndrome (CBS) with stent-grafts are promising, but some are unfavorable. This study sought to evaluate the hemostatic efficacy, safety, and outcome of reconstructive, endovascular stent-graft placement in patients with head-and-neck cancers in association with CBS. METHODS: Eight patients with head-and-neck cancers with CBS were treated with self-expandable stent-grafts. We evaluated the initial hemostatic results, complications, and outcomes by assessing the clinical and imaging findings. RESULTS: Immediate hemostasis was achieved in all patients. Initial complications included stroke in 1 patient and asymptomatic thrombosis of the carotid artery in 2 patients. Delayed complications included rebleeding, delayed carotid thrombosis, and brain abscess formation. Rebleeding was noted in 4 patients and was successfully managed with a second stent-graft and embolization in 2 of them. Delayed carotid thrombosis with follow-up after 3 months was found in 3 patients, 1 of whom had associated brain abscesses. CONCLUSION: Although stent-grafts achieved immediate and initial hemostasis in patients with head-and-neck cancers and CBS, long-term safety, stent patency, and permanency of hemostasis appeared unfavorable. This treatment may be for temporary or emergency purposes rather than serving as a permanent measure. We suggest its applications in patients with acute CBS that precludes performance of an occlusion test, as well as when carotid occlusion poses an unusually high risk of neurologic morbidity. We also propose prophylactic antibiotic treatment and combined embolization of pathologic vascular feeders to improve outcomes.


Assuntos
Falso Aneurisma/terapia , Angioplastia com Balão/métodos , Implante de Prótese Vascular/métodos , Doenças das Artérias Carótidas/terapia , Emergências , Hemorragia/terapia , Técnicas Hemostáticas , Neoplasias Otorrinolaringológicas/complicações , Stents , Doença Aguda , Adulto , Idoso , Falso Aneurisma/diagnóstico , Falso Aneurisma/etiologia , Artérias Carótidas/patologia , Artérias Carótidas/efeitos da radiação , Doenças das Artérias Carótidas/diagnóstico , Doenças das Artérias Carótidas/etiologia , Terapia Combinada/efeitos adversos , Diagnóstico por Imagem , Feminino , Seguimentos , Hemorragia/diagnóstico , Hemorragia/etiologia , Humanos , Masculino , Pessoa de Meia-Idade , Invasividade Neoplásica , Neoplasias Otorrinolaringológicas/diagnóstico , Neoplasias Otorrinolaringológicas/terapia , Lesões por Radiação/complicações , Lesões por Radiação/diagnóstico , Lesões por Radiação/terapia , Fatores de Risco
9.
AJNR Am J Neuroradiol ; 27(7): 1543-5, 2006 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-16908577

RESUMO

A patient with hypopharyngeal cancer developed carotid blowout syndrome (CBS) treated by self-expandable stent-graft in the left carotid artery. CT scan for progressive right hemiparesis 4 months later showed multiple left cerebral abscesses and left carotid thrombosis. Although deployment of stent-grafts for CBS can achieve initial hemostasis in patients with head-and-neck cancer, the placement of a stent-graft in a field of necrosis and infection is associated with poor long-term outcome. We recommend the use of prophylactic antibiotics if endovascular foreign materials are placed in a contaminated field.


Assuntos
Falso Aneurisma/terapia , Prótese Vascular/efeitos adversos , Abscesso Encefálico/etiologia , Doenças das Artérias Carótidas/terapia , Artéria Carótida Interna/patologia , Infecções Relacionadas à Prótese/etiologia , Stents/efeitos adversos , Carcinoma de Células Escamosas/radioterapia , Artérias Carótidas/efeitos da radiação , Trombose das Artérias Carótidas/etiologia , Artéria Carótida Primitiva/patologia , Seguimentos , Humanos , Neoplasias Hipofaríngeas/radioterapia , Masculino , Pessoa de Meia-Idade , Lesões por Radiação/terapia
10.
AJNR Am J Neuroradiol ; 36(3): 508-17, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25339645

RESUMO

BACKGROUND AND PURPOSE: Suprasellar papillary craniopharyngiomas and germ cell tumors in adults share some clinical and imaging similarities but have different therapeutic strategies and outcomes. This study aimed to evaluate the pretreatment diagnosis of these 2 tumors to improve the therapeutic outcome. MATERIALS AND METHODS: We retrospectively enrolled 18 adults with papillary craniopharyngiomas and 17 with germ cell tumors. The MR imaging findings were evaluated, including signal change and anatomic extension. The medical records were reviewed to collect clinical findings, management, and outcomes. RESULTS: The clinical findings of papillary craniopharyngiomas versus germ cell tumors were as follows: age: 46 ± 13.9 years versus 23 ± 7.1 years (P < .0001); diabetes insipidus: 2/18 (11%) versus 11/17 (65%) (P = .001); recurrence 13/16 (81%) versus 4/17 (24%) (P = .0031). The MR imaging findings of papillary craniopharyngiomas versus germ cell tumors were as follows­pituitary stalk thickening: 1.6 ± 0.4 mm versus 5.4 ± 4.2 mm (P < .0001); vertical infundibular extension: 1/18 (6%) versus 16/17 (94%) (P < .0001); sagittal spheric shape: 17/18 (94%) versus 1/17 (6%) (P < .0001); diffusion restriction: 1/17 (6%) versus 8/12 (67%) (P = .0009). CONCLUSIONS: Younger age, diabetes insipidus, MR imaging characteristics of restricted diffusion, and vertical infundibular extension favor the diagnosis of germ cell tumors. Spheric shape without infundibular infiltration provides clues to papillary craniopharyngiomas, which originate from the pars tuberalis and are located outside the third ventricle. We suggest that suprasellar germ cell tumor is possibly an intraventricular lesion. Appropriate treatment planning can be initiated according to the diagnosis and anatomic location.


Assuntos
Craniofaringioma/diagnóstico , Neoplasias Embrionárias de Células Germinativas/diagnóstico , Neoplasias Hipofisárias/diagnóstico , Adulto , Idoso , Craniofaringioma/patologia , Craniofaringioma/radioterapia , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/patologia , Neoplasias Embrionárias de Células Germinativas/patologia , Neoplasias Hipofisárias/patologia , Neoplasias Hipofisárias/radioterapia , Estudos Retrospectivos , Terceiro Ventrículo/patologia , Adulto Jovem
11.
J Clin Psychiatry ; 60(8): 550-3, 1999 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-10485638

RESUMO

BACKGROUND: Persecutory delusions are common in dementia. This study was undertaken to investigate the prevalence, associated factors, and characteristics of persecutory delusions in demented patients. METHOD: The sample population included 167 demented patients (DSM-III-R criteria) admitted to a geropsychiatric ward. Patients were assessed for the occurrence of any persecutory delusions since the onset of dementia. The content of persecutory delusions, the patients' response to the delusions, and any concomitant psychiatric symptoms were also explored. RESULTS: Of the 167 demented patients, 45 (26.9%) showed symptoms of persecutory delusions. Patients with persecutory delusions had a higher prevalence of other delusions, hallucinations, and physically aggressive behaviors. The deluded patients often thought that their caregivers were their persecutors and had a wide range of responses to their delusions. After they were hospitalized, many of these patients attacked medical staff and were uncooperative with treatment. CONCLUSION: Persecutory delusions are common in dementia of various types. Deluded patients often have vigorous responses to their delusions including physically aggressive behaviors and suicide attempts. Careful evaluation is needed to assess the potential for violent and suicidal behaviors in these patients. Medical staff should be alert to clinical strategies for handling the treatment of such patients when they become violent or uncooperative.


Assuntos
Delusões/diagnóstico , Demência/diagnóstico , Idade de Início , Idoso , Agressão/psicologia , Doença de Alzheimer/diagnóstico , Doença de Alzheimer/epidemiologia , Doença de Alzheimer/psicologia , Comorbidade , Delusões/epidemiologia , Delusões/psicologia , Demência/epidemiologia , Demência/psicologia , Feminino , Alucinações/diagnóstico , Alucinações/epidemiologia , Alucinações/psicologia , Hospitalização , Humanos , Masculino , Prevalência , Escalas de Graduação Psiquiátrica/estatística & dados numéricos , Tentativa de Suicídio/psicologia , Tentativa de Suicídio/estatística & dados numéricos , Taiwan/epidemiologia , Veteranos/psicologia
12.
AJNR Am J Neuroradiol ; 21(9): 1753-6, 2000 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-11039361

RESUMO

Embolization of a carotid cavernous fistula (CCF) by means of a detachable balloon is an established method for treating CCFs while preserving a patent parent internal carotid artery (ICA). However, failure to embolize the CCF may occur on a few occasions, such as when the balloon cannot pass through the fistula into the cavernous sinus by blood flow, or when the inflated balloon in the cavernous sinus retracts to the carotid artery. Under these circumstances, the ICA may have to be sacrificed in order to treat the CCF. Herein we describe a double-balloon technique for embolization of a CCF. By applying this technique, we successfully treated nine of 11 CCFs, without compromise of the parent ICA when the conventional one-balloon technique failed.


Assuntos
Fístula Carótido-Cavernosa/terapia , Embolização Terapêutica/métodos , Oclusão com Balão , Artéria Carótida Interna/diagnóstico por imagem , Fístula Carótido-Cavernosa/diagnóstico por imagem , Seio Cavernoso/diagnóstico por imagem , Embolização Terapêutica/instrumentação , Humanos , Radiografia Intervencionista
13.
AJNR Am J Neuroradiol ; 17(6): 1057-64, 1996.
Artigo em Inglês | MEDLINE | ID: mdl-8791916

RESUMO

PURPOSE: To describe the neuroimaging (Ct, MR, and single-photon emission CT [SPECT]) findings in a series of patients with chorea-ballismus associated with nonketotic hyperglycemia in primary diabetes mellitus and to correlate the imaging findings with the clinical presentation. METHODS: The neuroimaging and clinical data from 10 patients with chorea-ballismus associated with nonketotic hyperglycemia in primary diabetes mellitus were evaluated. Family and drug histories, as well as other causes of chorea, were excluded. All 10 patients had CT, 5 also had MR imaging, and 3 had SPECT examinations. Three had follow-up CT and MR imaging studies, and MR findings were correlated with CT findings in 5 cases. Two experienced neuroradiologists, aware of the diagnosis but blinded to the clinical status of the patients, evaluated all images and reached a consensus as to the final interpretation. RESULTS: CT studies in 9 of 10 patients showed a hyperdense putamen and/or caudate nucleus; in 1, the CT findings were normal. T1-weighted MR images in all 5 patients who had MR imaging (including the patient with a normal CT study) showed hyperintense lesions without significant T2 signal alternation at the basal ganglia. In all 3 of the patients who had SPECT studies of the brain, the scans revealed hypoperfusion at corresponding areas. All 3 follow-up studies depicted resolution of the lesions in the abnormal basal ganglia. Increased hypointensity on T2-weighted and gradient-echo T2*-weighted images was also observed in the sequential MR images. In all patients, the initial side of involvement correlated well with the neuroimaging findings. The chorea resolved within 2 days after treatment of the hyperglycemia in 9 patients. CONCLUSION: In patients with chorea-ballismus associated with nonketotic hyperglycemia in primary diabetes mellitus, CT and T1-weighted MR images show unilateral or bilateral lesions of the putamen and/or caudate. SPECT scans show hypoperfusion. These findings may be related to petechial hemorrhage and/or myelin destruction. Early recognition of these imaging characteristics may facilitate diagnosis of primary diabetes mellitus with hyperglycemia and prompt appropriate therapy.


Assuntos
Doenças dos Gânglios da Base/diagnóstico , Encefalopatias Metabólicas/diagnóstico , Coreia/diagnóstico , Coma Hiperglicêmico Hiperosmolar não Cetótico/diagnóstico , Imageamento por Ressonância Magnética , Tomografia Computadorizada de Emissão de Fóton Único , Tomografia Computadorizada por Raios X , Idoso , Isquemia Encefálica/diagnóstico , Núcleo Caudado/patologia , Dominância Cerebral/fisiologia , Humanos , Masculino , Pessoa de Meia-Idade , Exame Neurológico , Putamen/patologia , Estudos Retrospectivos
14.
Laryngoscope ; 110(9): 1483-8, 2000 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-10983947

RESUMO

OBJECTIVE: To evaluate the efficacy of salvage surgery in the treatment of recurrent nasopharyngeal carcinoma (NPC) at the primary site. STUDY DESIGN: A retrospective investigation of the outcome of salvage surgery for 28 patients with recurrent NPC after definite radiation therapy. METHODS: The nasopharynx was approached anteroposteriorly by the transmaxillary approach (maxillary swing, maxillectomy) or inferior approach (midline mandibulotomy or median labiomandibular glossotomy), or laterally by modified facial translocation or transpterygoid approach; intentional ligation of the internal carotid artery was performed after establishment of extracranial-intracranial (EC-IC) bypass in one patient; postoperative irradiation was given to the patients with positive pathological margins. RESULTS: Nine patients lived without disease for 20 to 93 months (mean interval, 52 mo) after surgery; among them, eight patients had T1 tumors that were resected totally by surgery via anteroposterior approaches and the other patient had postoperative irradiation to control the disease. Seven patients had local recurrence 8 to 21 months after treatment. Four patients developed distant metastases, including one patient with a T2b tumor that was totally resected through modified facial translocation approach with ligation of internal carotid artery. Eight patients died of other causes; internal carotid artery blowout was the cause of death in four of these eight patients. CONCLUSIONS: In most cases of recurrence, T1 nasopharyngeal tumors can be resected totally by anteroposterior approaches; for T2 or larger tumors, postoperative irradiation is usually necessary. Otherwise, facial translocation offers a better chance to completely resect the tumors. Internal carotid artery is better ligated if patients have received greater than 70 Gy irradiation or if the artery must be exposed during the surgery. We suggest that EC-IC bypass be used to avoid the possible complications (or cerebral ischemic stroke) caused by ligation of internal carotid artery. The transmaxillary approach is favored in the management of nasopharyngeal tumor recurrence with nasal cavity extension, and midline mandibulotomy is more suitable for resection of posterior margin of nasopharyngeal tumor recurrence. Facial translocation offers the widest operative field and is the most versatile approach for radical resection of nasopharyngeal tumor recurrence, but the surgeon should be skilled in the management of the facial nerves to reduce morbidity.


Assuntos
Neoplasias Nasofaríngeas/cirurgia , Recidiva Local de Neoplasia/cirurgia , Procedimentos Cirúrgicos Otorrinolaringológicos/métodos , Terapia de Salvação/métodos , Adulto , Idoso , Terapia Combinada , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias Nasofaríngeas/radioterapia , Recidiva Local de Neoplasia/radioterapia , Cuidados Pós-Operatórios , Estudos Retrospectivos
15.
Clin Neurol Neurosurg ; 100(1): 27-30, 1998 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-9637200

RESUMO

A 63-year-old man developed a severe left frontal headache followed by an acute change of mentality 6 days later. Magnetic resonance imaging revealed bilateral thalamic ischemia. Angiography confirmed the occlusion of deep cerebral veins. Proton magnetic resonance spectroscopy (1H-MRS) of the thalami showed normal N-acetylaspartate (NAA) peak and the presence of lactate peak, indicating a relatively preserved neuronal viability. The patient improved during the follow-up period, and returned to work 45 days after the onset of the disease. With 1H-MRS, prognosis following venous infarctions may be feasible.


Assuntos
Trombose dos Seios Intracranianos/diagnóstico , Humanos , Imageamento por Ressonância Magnética , Espectroscopia de Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Prognóstico , Tálamo/patologia
16.
Seizure ; 9(8): 605-7, 2000 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-11162761

RESUMO

We report on a 22-year-old assistant cook, presenting with seizures evoked by immersing his right hand into hot water of 40-46 degrees C. His seizure pattern consisted of either simple partial seizures of a tingling sensation arising in the right hand and marching to the right shoulder or a similar attack evolving to a complex partial seizure. Video-EEG monitoring recorded habitual seizures originating from the left centro-temporo-parietal region, compatible with lesions seen on brain magnetic resonance imaging. He responded well to antiepileptic drug treatment and wearing gloves while working in the kitchen. In this patient, hot water of 40-46 degrees C could maximally stimulate skin warm thermoreceptors in the right hand whereby afferent impulses subsequently activated the epileptogenic focus, adjacent to or in the sensory cortex, and elicited seizures.


Assuntos
Epilepsias Parciais/diagnóstico , Epilepsia Parcial Complexa/diagnóstico , Mãos/inervação , Imersão/fisiopatologia , Temperatura Cutânea/fisiologia , Adulto , Vias Aferentes/fisiopatologia , Mapeamento Encefálico , Dominância Cerebral/fisiologia , Epilepsias Parciais/fisiopatologia , Epilepsia Parcial Complexa/fisiopatologia , Humanos , Imageamento por Ressonância Magnética , Masculino , Lobo Parietal/fisiopatologia , Lobo Temporal/fisiopatologia , Termorreceptores/fisiologia
17.
J Formos Med Assoc ; 99(11): 833-8, 2000 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-11155772

RESUMO

PURPOSE: The purpose of this study was to characterize the computed tomography (CT) and magnetic resonance (MR) imaging features of giant pituitary adenoma (GPA) and to demonstrate the pathways of the spread of GPA. METHODS: CT and/or MR imaging scans of 356 patients evaluated preoperatively for single pituitary tumor were reviewed. Fourteen tumors (4%) fulfilled the radiologic criteria for GPA. There were 10 male and four female patients, ranging in age from 22 to 71 years (mean, 52 yr). We retrospectively reviewed the CT and MR imaging scans of these patients to characterize tumor appearances and identify the pathways of tumor extension. RESULTS: Thirteen tumors (93%) extended upward to the suprasellar cistern, and/or hypothalamus and third ventricle. Infrasellar extension through the sellar floor and sphenoid sinus to the skull base, or to the ethmoid sinus or the nasopharynx, was identified in seven patients (50%). Eight patients (57%) had lateral invasion to the cavernous sinus. Temporal and frontal extension was apparent in seven patients (50%) and six patients (43%), respectively. Five patients (36%) had posterior subtentorial extension to the posterior fossa. Histologically, only two GPAs showed invasive features. There was no correlation among histologic features, pituitary hormone concentrations, and evidence of tumor aggressiveness on CT and MRI scans. CONCLUSIONS: GPA has the potential for widespread, multi-directional extension. Our results indicate that any type of pituitary adenoma, regardless of its endocrinologic activity, may invade surrounding structures. Suprasellar invasion is the most common pathway of tumor spread, followed by infrasellar, lateral, anterior, and posterior routes.


Assuntos
Adenoma/diagnóstico , Imageamento por Ressonância Magnética , Neoplasias Hipofisárias/diagnóstico , Tomografia Computadorizada por Raios X , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
18.
Kaohsiung J Med Sci ; 16(1): 26-31, 2000 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-10741013

RESUMO

The purpose of our study was to examine the tumor size, imaging invasiveness of the pituitary macroadenomas (PMA) and to evaluate the directions of PMA spread. One hundred and thirty-five patients with PMA were examined with MRI and/or CT for pre-operative evaluation. We retrospectively reviewed the CT and MRI to identify tumor size, extension and to evaluate the directions of tumor spread. One hundred and seventeen patients (87%) had suprasellar extension with compression of optic apparatuses, twelve patients (9%) had extension of tumor upward to hypothalamus and third ventricle. Infrasellar extension via the floor of the sella and sphenoid sinus was found in thirty-eight patients (28%), and further downward extension to ethmoid sinus, nasopharynx and/or skull base was depicted in five patients (4%). Twenty-two patients (16%) had lateral invasion to the cavernous sinus and associated cranial nerves. Temporal and frontal extensions were depicted in seven patients (5%) and six patients (4%), respectively. Five patients (4%) had posterior subtentorial extension to posterior fossa. Histologically, only two patients showed microscopic invasive features. There was no correlation between histologic features and imaging invasiveness. The PMA had the potential of multi-directional extension. This experience indicated any type of pituitary adenoma could invade surrounding structures. Suprasellar invasion was the most common direction of pituitary adenoma spread, followed by infrasellar, lateral, anterior and posterior routes.


Assuntos
Adenoma/diagnóstico , Neoplasias Hipofisárias/diagnóstico , Adenoma/patologia , Adolescente , Adulto , Idoso , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Invasividade Neoplásica , Neoplasias Hipofisárias/patologia , Estudos Retrospectivos , Tomografia Computadorizada de Emissão
19.
Kaohsiung J Med Sci ; 13(8): 467-74, 1997 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-9311197

RESUMO

Thirteen cases of pathologically proved intracranial gangliogliomas were reviewed in order to define the characteristic computed tomography (CT) and magnetic resonance image (MRI)-features. All patients were evaluated with CT and four of them were studied by MRI. Six tumors were cystic dominant mixed masses with remarkable focal contrast enhancement (6/13, 46%); and seven were solid in nature with variable contrast enhancement (7/13, 54%). Nine of them contained calcification (9/13, 69%). The temporal lobe was affected in six patients (6/13, 46%); the posterior fossa in four patients; the frontal lobe in two; the remaining huge one in the frontal, temporal and basal ganglion. On MRI, the findings were similar to those of the CT. Gangliogliomas do not have a characteristic CT and MRI features. They may appear as pure cystlike tumors, cystic dominant mixed tumors with remarkable focal contrast enhancement, solid tumors with variable contrast enhancement or diffuse involving the brain parenchyma and/or subarachnoid spaces. However, radiologists should include ganglioglioma in the differential diagnosis when we find patient has a long-standing process as well as a calcified tumor in the temporal lobe with following characteristic; cystic dominant mixed tumor with remarkable focal contrast enhancement, or a solid mass without hemorrhage or significant surrounding edema.


Assuntos
Neoplasias Encefálicas/patologia , Ganglioglioma/patologia , Adolescente , Adulto , Neoplasias Encefálicas/diagnóstico por imagem , Criança , Pré-Escolar , Feminino , Ganglioglioma/diagnóstico por imagem , Humanos , Imageamento por Ressonância Magnética , Masculino , Tomografia Computadorizada por Raios X
20.
Kaohsiung J Med Sci ; 17(3): 161-6, 2001 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-11486649

RESUMO

Acute disseminated encephalomyelitis (ADEM) and multiple sclerosis (MS) are both demyelinating white matter disorders. It is difficult to differentiate ADEM from single episode MS because of the similar clinical presentation, cerebral spinal fluid (CSF) analysis, histological finding and magnetic resonance image (MRI) appearance. We report an ADEM case with unusual clinical presentations of predominant psychiatric symptoms, and relatively long disease course. Initially, we were not able to distinguish it from single episode MS. By means of sequential MR images followed up 2 years and spectroscopy studies, and the dramatic clinical improvement after corticosteroid therapy, ADEM was diagnosed as the disease entity of this patient. In this case report we will present the MR findings of this patient and discuss the differentiation between the ADEM and MS.


Assuntos
Encefalomielite Aguda Disseminada/diagnóstico , Transtornos Mentais/diagnóstico , Esclerose Múltipla/diagnóstico , Adulto , Feminino , Humanos , Imageamento por Ressonância Magnética
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