Pneumocephalus as a delayed mastoidectomy complication

2007 ◽  
Vol 121 (4) ◽  
pp. 401-403 ◽  
Author(s):  
F Jégoux ◽  
B Godey ◽  
L Riffaud ◽  
X Morandi
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Middle Ear ◽  
Clinical Signs ◽  
Cerebrospinal Fluid Leak ◽  
Accurate Information ◽  
Middle Ear Surgery ◽  
Resonance Imaging ◽  
Tegmen Tympani

We report the case of a 43-year-old woman who presented with a spontaneous pneumocephalus, 37 years after a mastoidectomy. Clinical examination showed a cerebrospinal fluid leak, meningeal herniation in the superior part of the middle ear, and an audible noise from her ear when she stood up due to the entrance of air into the cranium. A computed tomography scan and magnetic resonance imaging showed the complete destruction of the tegmen tympani and the pneumocephalus in the temporal lobe. The patient underwent an emergency operation via a double middle-ear and subtemporal approach. The meningoencephalocoele and pneumocephalus were probably due to long term pressure upon too thin a tegmen tympani.Pneumocephalus should be considered as a potential delayed post-operative complication of middle-ear surgery. Computed tomography and magnetic resonance imaging scanning supply accurate information and enable a planned surgical approach; they also allow a pathophysiological understanding and a correlation between the clinical signs and the radiological and peri-operative findings.

scholarly journals Diagnostic value of magnetic resonance imaging and computed tomography for oral masses in dogs

2004 ◽  
Vol 75 (4) ◽  
Author(s):  
U.C.M. Kafka ◽  
A. Carstens ◽  
G. Steenkamp ◽  
H. Symington
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Bone Erosion ◽  
Diagnostic Value ◽  
Accurate Information ◽  
Gingival Hyperplasia ◽  
Resonance Imaging ◽  
Additional Information ◽  
Adjacent Structures

The purpose of this study was to determine the diagnostic value of magnetic resonance imaging (MRI) and computed tomography (CT) in oral masses of dogs. Nineteen dogs underwent clinical, MR and CT examinations. Eleven malignant and ten non-malignant masses were evaluated. Osteosarcoma was the most commonly found malignant oral mass and gingival hyperplasia was the most commonly found benign mass. The results showed that MRI provided more accurate information regarding the size of the masses and invasion of adjacent structures although MRI and CT show similar accuracy in assessment of bone invasion. Calcification and cortical bone erosion was better seen on CT images. Whereas contrast-MRI provided useful additional information, contrast-CT had no added benefit. In general, oral masses located in the caudal mandible, oropharynx and maxilla are better evaluated using MRI, once the histological type has been verified.

Angiography, Computed Tomography, Magnetic Resonance Imaging and Ultrasonography in Detection of Liver Metastases from Endocrine Gastrointestinal Tumours

1987 ◽  
Vol 28 (5) ◽  
pp. 535-539 ◽  
Author(s):  
T. Andersson ◽  
B. Eriksson ◽  
A. Hemmingsson ◽  
P. G. Lindgren ◽  
K. Öberg
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Liver Metastases ◽  
Therapy Monitoring ◽  
Tumour Size ◽  
Clinical Signs ◽  
Chemotherapeutic Agents ◽  
Resonance Imaging ◽  
Therapy Effect

Twenty-five patients with endocrine tumours (13 with endocrine pancreatic tumours and 12 with carcinoids) were examined with angiography, computed tomography, magnetic resonance imaging and ultrasonography. Seventeen patients had liver metastases and were followed between 3 and 66 months with serial examinations during treatment with chemotherapeutic agents and interferon. The efficiency of the various techniques to detect metastases was investigated. Analysis of changes in tumour size during treatment was made to see if treatment effects could be monitored with radiologic examinations. Ultrasonography was the best non-invasive method for detection of metastases and is recommended as standard method for imaging in this group of patients. Angiography was even better showing extremely small metastases, less than 5 mm, and is recommended in selected cases. With one exception, no significant change in tumour size was noted in spite of clear laboratory and clinical signs of therapy effect indicating that tumour size determination is not useful for therapy monitoring in this type of disease.

Radiological findings in spontaneous cerebrospinal fluid leaks of the temporal bone

2021 ◽  
pp. 1-7
Author(s):  
T Hendriks ◽  
A Thompson ◽  
R Boeddinghaus ◽  
H E I Tan ◽  
J Kuthubutheen
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Cerebrospinal Fluid ◽  
Magnetic Resonance ◽  
Temporal Bone ◽  
Cerebrospinal Fluid Leak ◽  
Resonance Imaging ◽  
Cerebrospinal Fluid Leaks ◽  
Temporal Bones ◽  
Fluid Leak

Abstract Background and objective Spontaneous cerebrospinal fluid leak of the temporal bone is an emerging clinical entity for which prompt and accurate diagnosis is difficult given the subtle signs and symptoms that patients present with. This study sought to describe the key temporal bone abnormalities in patients with spontaneous cerebrospinal fluid leak. Methods A retrospective cohort study was conducted of adult patients with biochemically confirmed spontaneous cerebrospinal fluid leak. Demographics and radiological features identified on computed tomography imaging of the temporal bones and/or magnetic resonance imaging were analysed. Results Sixty-one patients with spontaneous cerebrospinal fluid leak were identified. Fifty-four patients (88.5 per cent) underwent both temporal bone computed tomography and magnetic resonance imaging. Despite imaging revealing bilateral defects in over 75 per cent of the cohort, only two patients presented with bilateral spontaneous cerebrospinal fluid leaks. Anterior tegmen mastoideum defects were most common, with an average size of 2.5 mm (range, 1–10 mm). Conclusion Temporal bone computed tomography is sensitive for the identification of defects when suspicion exists. In the setting of an opacified middle ear and/or mastoid, close examination of the skull base is crucial given that this fluid is potentially cerebrospinal fluid.

scholarly journals Radiološke slikovnopreiskovalne metode pri akutni možganski kapi

2015 ◽  
Vol 84 (1) ◽  
Author(s):  
Katarina Šurlan Popovič ◽  
Urška Lamot
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Acute Stroke ◽  
Brain Tissue ◽  
Comprehensive Evaluation ◽  
Accurate Information ◽  
Resonance Imaging ◽  
Imaging Evaluation ◽  
Magnetic Resonance Perfusion

Stroke is the third most common cause of death in the developed world and the leading cause of adult disability. The goals of an imaging evaluation for acute stroke when presented with patients with raised clinical suspicion of an acute stroke are to obtain accurate information about the momentary state of brain tissue. A comprehensive evaluation is best achieved with a combination of computed tomography or magnetic resonance imaging technique. Unenhanced computed tomography and magnetic resonance imaging can help rule out hemorrhage and identify early morphologic signs of acute brain ischemia. Computed tomography and magnetic resonance perfusion imaging and magnetic resonance diffusion weight imaging, can help depict unsalvageable ischemic brain tissue and the area of penumbra. Computed tomography angiography and magnetic resonance angiography are widely used techniques for assessment of both, the intracranial and neck circulation.

Indications for and Accuracy of Magnetic Resonance Imaging and Computed Tomography in Orbital Disease

1992 ◽  
Vol 37 (1) ◽  
pp. 11-17 ◽  
Author(s):  
J.R. Ainsworth ◽  
D.M. Hadley ◽  
P. Macpherson ◽  
R. McFadzean ◽  
A. Lawrence ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Final Diagnosis ◽  
Accurate Information ◽  
Resonance Imaging ◽  
Presenting Symptoms ◽  
One Year ◽  
Orbital Imaging ◽  
Orbital Disease

All patients referred for orbital imaging to the neuroradiology department of the Institute of Neurological Sciences in Glasgow over a three year period were enrolled in the study and were scheduled to undergo both magnetic resonance imaging and computed tomography. A total of 101 of the 110 referred patients were deemed suitable for analysis. Details of key presenting symptoms, signs, and a pre-imaging diagnosis were recorded prospectively. A final diagnosis was obtained by histology in 65% of cases with an orbital abnormality, by a minimum of one year of clinical review in 19.5%, by response to antibiotic or steriod therapy in 8.5%, or by conclusive investigations such as carotid angiography in 7% of patients. 29% of the patients had no detectable orbital disease despite a minimum one years' follow-up, and so were regarded as a, “normal” group. The images were interpreted prospectively by separate masked observers. The diagnostic accuracies of the two techniques were compared to the final diagnosis. The two imaging methods were shown to be comparable in overall diagnostic accuracy, with a small and statistically non-significant advantage held by magnetic resonance imaging. Interpretation of the two investigations gave more accurate information in different types of disease.

Computed tomography and magnetic resonance imaging of pathologic conditions of the middle ear

2001 ◽  
Vol 40 (2) ◽  
pp. 78-93 ◽  
Author(s):  
R Maroldi ◽  
D Farina ◽  
L Palvarini ◽  
A Marconi ◽  
E Gadola ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Middle Ear ◽  
Resonance Imaging

scholarly journals Imaging evaluation of middle ear cholesteatoma: iconographic essay

2013 ◽  
Vol 46 (4) ◽  
pp. 247-251
Author(s):  
Ana Flávia Assis de Ávila ◽  
Bruna de Oliveira Melim Aburjeli ◽  
Wanderval Moreira ◽  
Emília Guerra Pinto Coelho Motta ◽  
Marcelo Almeida Ribeiro ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Middle Ear ◽  
Multislice Computed Tomography ◽  
Common Disease ◽  
Resonance Imaging ◽  
Imaging Evaluation ◽  
Middle Ear Cholesteatoma ◽  
Pictorial Essay

Middle ear cholesteatoma is a relevant and relatively common disease that may have severe consequences. In the present pictorial essay, the authors have selected illustrative examples of multislice computed tomography and magnetic resonance imaging depicting the main presentations of cholesteatomas, and describing their characteristics, locations, and major complications.

scholarly journals Both Magnetic Resonance Imaging and Computed Tomography Are Reliable and Valid in Evaluating Cystic Osteochondral Lesions of the Talus

2020 ◽  
Vol 8 (9) ◽  
pp. 232596712094669
Author(s):  
En Deng ◽  
Lixiang Gao ◽  
Weili Shi ◽  
Xing Xie ◽  
Yanfang Jiang ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Measurement Method ◽  
Intraclass Correlation ◽  
Classification Systems ◽  
Osteochondral Lesions ◽  
Accurate Information ◽  
Resonance Imaging ◽  
Ct Classification

Background: Compared with computed tomography (CT), magnetic resonance imaging (MRI) might overestimate the condition of osteochondral lesions of the talus (OLTs) owing to subchondral bone marrow edema and the overlying cartilage defect. However, no study has compared MRI and CT directly in evaluating OLTs with subchondral cysts. Purpose: To compare the reliability and validity of MRI and CT in evaluating OLTs with subchondral cysts. Study Design: Cohort study (diagnosis); Level of evidence, 2. Methods: An institutional radiology database was queried for inpatients diagnosed with OLTs with subchondral cysts who had undergone surgical treatment between May 2015 and October 2019. A total of 48 patients met the inclusion criteria. Based on our measurement method, 2 experienced observers who were blinded to the study independently measured the length, width, and depth of the cysts using MRI and CT. The classification of cystic lesions was also performed based on MRI and CT findings. Results: Interobserver reliability was almost perfect, with intraclass correlation coefficients (ICCs) ranging from 0.935 to 0.999. ICCs for intraobserver reliability ranged from 0.944 to 0.976. The mean size of cysts measured on MRI (length, 13.38 ± 4.23 mm; width, 9.28 ± 2.28 mm; depth, 11.54 ± 3.69 mm) was not significantly different to that evaluated on CT (length, 13.40 ± 4.08 mm; width, 9.25 ± 2.34 mm; depth, 11.32 ± 3.54 mm). The size of subchondral cysts was precisely estimated on both MRI and CT. The MRI classification and CT classification revealed almost perfect agreement (kappa = 0.831). Conclusion: With our measurement method, both MRI and CT were deemed to be reliable and valid in evaluating the size of subchondral cysts of OLTs, and the MRI classification was well-correlated with the CT classification. The presented measurement method and classification systems could provide more accurate information before surgery.

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