Diffusion-weighted MRI features of brain abscess and cystic or necrotic brain tumors

Chang, Shih Chin; Lai, Ping Hong; Chen, Wei‐Liang; Weng, Hsu–Huei; Ho, Juliana T.S.; Wang, Jyh Seng; Chang, Chuan Yu; Pan, Huay‐Ben; Yang, Chun‐Feng

doi:10.1016/s0899-7071(02)00436-9

Cited by 200 publications

(117 citation statements)

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“…However, normal ADC values are usually seen [5]. Pyogenic abscesses are infrequently multiple and typically show restricted diffusion [4]. Additionally, a rim of hyperintensity on T1-weighted images and low signal on long-TR sequences due to the presence of free radicals is characteristically found.…”

Section: Discussionmentioning

confidence: 99%

Simultaneous supratentorial and brainstem abscesses due to Listeria monocytogenes

Soares-Fernandes

Beleza

Cerqueira

et al. 2008

Journal of Neuroradiology

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Multiple supratentorial abscesses caused by Listeria monocytogenes are rare. We report the simultaneous occurrence of multiple supratentorial and brainstem abscesses due to Listeria, in a patient under corticotherapy for an exacerbation of ulcerative colitis. MR imaging features before and after successful conservative treatments are depicted. In immunocompromised patients with supratentorial listerial abscesses, the coexistence of brainstem abscedation is exceptional. Despite high mortality associated with listerial abscesses, this case illustrates the possibility of a good clinical outcome, if the appropriate antibiotic regimen is instituted and the immunosuppressant agent is discontinued. © 2007 Elsevier Masson SAS. All rights reserved. MOTS CLÉS

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Section: Discussionmentioning

confidence: 99%

Simultaneous supratentorial and brainstem abscesses due to Listeria monocytogenes

Soares-Fernandes

Beleza

Cerqueira

et al. 2008

Journal of Neuroradiology

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“…[6][7][8][9] Annet et al 7 found that the mean ADC value was approximately 1.070 ϫ 10 7 A brain abscess also shows increased DW signal intensity; however, this is primarily caused by restricted diffusion from the increased viscosity of the fluid inside. [10][11] Chang et al 11 demonstrated that the mean ADC value in an abscess was 0.650 ϫ 10 Ϫ6 mm 2 /s. From these differences, it can be inferred that the ADC value could be used to help differentiate epidermoid lesions from abscess.…”

mentioning

confidence: 99%

Apparent Diffusion Coefficient Values of Middle Ear Cholesteatoma Differ from Abscess and Cholesteatoma Admixed Infection

Thiriat¹,

Riehm²,

Kremer³

et al. 2009

AJNR Am J Neuroradiol

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SUMMARY:A retrospective study was conducted on a cohort of 15 patients who underwent surgery because cholesteatoma or abscess was suspected. All patients had MR imaging prior to surgery with diffusion-weighted images (DWI) from which the apparent diffusion coefficient (ADC) value was calculated. Using this technique, we were able to determine 3 distinct ADC value ranges corresponding to the 3 groups of lesions found at surgery (pure cholesteatoma, cholesteatoma with infection, and abscess or infection). This needs to be confirmed by further studies with a wider range of patients.

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“…Chang ve ark. [17] kistik, nekrotik beyin tümörleri ile beyin apselerini karşılaştırdıkları çalışma-larında apseli dokularda ortalama GDK değe-rini 0.65x10 -3 mm 2 /sn olarak bulmuşlardır. Bir başka çalışmada Leuthardt ve ark.…”

Section: şEkil 3 Sol Kulakta Geçirilmiş Masteidektomi Ameliyatı öYküunclassified

Importance of diffusion weighted magnetic resonance imaging at differentiation of cholesteatoma and granulation tissue in patients with chronic suppurative otitis media

Tuzcu

Yardımcı²,

Turna³

et al. 2015

Kulak Burun Bogaz Ihtis Derg

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ÖZAmaç: Bu çalışmada kolesteatom ve granülasyon dokusu cerrahi ile düzeltilen hastaların ameliyat öncesi manyetik rezonans görüntülemelerinde eko-planar difüzyon ağırlıklı görüntüleme (EP-DAG)'nin önemi DAG ve görünür difüzyon katsayısı (GDK) değerleri doğrultusunda sunuldu. Hastalar ve Yöntemler:Aralık 2009 -Mayıs 2011 tarihleri arasında hastanemizin radyoloji kliniğine primer kazanılmış kolesteatomlu kronik otitis media ön tanısı ile başvuran ve ameliyat öncesi kliniğimizde kulak manyetik rezonans görüntüleme ve DAG ile değerlendirilen 91 hasta (52 erkek, 39 kadın; ort. yaş 40.7±15.8 yıl; dağı-lım 3-77 yıl) çalışmaya alındı. Difüzyon ağırlıklı görüntüleme sonuçları ameliyat bulguları ve patoloji sonuçları ile karşılaştırıldı. Hastalar görüntü arşivleme ve iletişim sistemi kullanılarak geriye dönük olarak değerlendirildi. Difüzyon ağırlıklı görüntüleme ve GDK görüntüleri niteliksel ve sayısal açıdan incelendi. Bulgular:Kolesteatom şüphesi bulunan 91 hasta ameliyat edildi. Ameliyat sonuçlarına göre, 50 hastada kolesteatom ve 41 hastada granülasyon dokusu vardı. Kolesteatomlu hastaların DAG değerleri granülasyon dokusu olan hastalara göre anlamlı olarak yüksekti (p<0.05). Kolesteatomlu hastaların ortalama GDK değerleri granülasyon dokusu olan hastalara göre anlamlı olarak düşük idi (p<0.05). Kolesteatomun saptanmasında EP-DAG'nin duyarlılık ve özgüllüğü sırasıyla %97.6 ve %92.0 idi. Sonuç: Görünür difüzyon katsayısı ve DAG kullanılarak yapılan EP-DAG özellikle 5 mm'nin üzerindeki kolesteatomların gösterilmesinde ve bunların diğer patolojilerden ayrımında yüksek duyarlılık ve özgüllük oranlarıyla değerli bir yöntemdir.Anahtar Sözcükler: Görünür difüzyon katsayısı; kolesteatom; eko-planar difüzyon ağırlıklı görüntüleme; granülasyon dokusu. ABSTRACTObjectives: This study aims to report the significance of echo-planar diffusion-weighted imaging (EP-DWI) in preoperative magnetic resonance imaging of patients with surgically corrected cholesteatoma and granulation tissue according to DWI and apparent diffusion coefficient (ADC) values. Patients and Methods:Ninety-one patients (52 males, 39 females; mean age 40.7±15.8 years; range 3 to 77 years) who admitted to radiology clinic of our hospital between December 2009 and May 2011 with a pre-diagnosis of chronic otitis media with primary acquired cholesteatoma and assessed preoperatively in our clinic by ear magnetic resonance imaging and DWI were included in the study. Diffusion-weighted imaging results were compared with operative findings and pathology results. Patients were retrospectively evaluated using picture archiving and communication system. Diffusion-weighted imaging and ADC images were examined qualitatively and quantitatively.Results: Ninety-one patients suspected of cholesteatoma were operated. According to the results of operations, 50 patients had cholesteatoma and 41 patients had granulation tissue. The mean DWI values of patients with cholesteatoma were significantly higher than patients with granulation tissue (p<0.05). The mean ADC values of patients w...

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Diffusion-weighted MRI features of brain abscess and cystic or necrotic brain tumors

Cited by 200 publications

References 13 publications

Simultaneous supratentorial and brainstem abscesses due to Listeria monocytogenes

Simultaneous supratentorial and brainstem abscesses due to Listeria monocytogenes

Apparent Diffusion Coefficient Values of Middle Ear Cholesteatoma Differ from Abscess and Cholesteatoma Admixed Infection

Importance of diffusion weighted magnetic resonance imaging at differentiation of cholesteatoma and granulation tissue in patients with chronic suppurative otitis media

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