MRI findings and spreading patterns of necrotizing external otitis: is a poor outcome predictable?


AIM:To evaluate spreading patterns of necrotizing external otitis (NEO) by magnetic resonance imaging (MRI) and to identify spreading patterns related to a poor outcome. MATERIALS AND METHODS:Fourteen patients with NEO were divided into good and poor outcome groups according to their final clinical outcomes. Initial MRI images were retrospectively reviewed for regional abnormalities, and follow-up MRI images were reviewed for ICA flow void abnormality and for the following five spreading patterns: medial, crossed, anterior, intracranial, and combined. The frequencies of the abnormal flow void or spreading patterns were compared between the good and poor response groups. RESULTS:Seven (50%) and seven (50%) patients were respectively allocated to the good and poor outcome groups. Retrocondylar fat infiltration was the most commonest finding on initial MRI images (93%). The frequencies of the abnormal flow void and spreading patterns in the good and poor groups, respectively, were: abnormal flow void, 0 and four (57%); anterior, two (29%) and three (43%); medial, six (86%) and seven (100%); crossed, six (86%) and seven (100%); intracranial middle cranial fossa, one (14%) and four (57%); intracranial posterior cranial fossa, four (57%) and six (86%); intracranial foramen magnum, one (14%) and six (86%). CONCLUSIONS:NEO almost always involves the retrocondylar fat and spreads via various pathways to extracranial or intracranial spaces. The presence of an abnormal flow void and intracranial dural enhancement, particularly in the middle cranial fossa and foramen magnum, may indicate a poor prognosis.


Clin Radiol


Clinical radiology


Kwon BJ,Han MH,Oh SH,Song JJ,Chang KH




Has Abstract


2006-06-01 00:00:00














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    abstract::Sporadic cases or radiation hepatitis have been reported following doses above 3500 rad delivered in 3-4 weeks to the liver. The authors report their experience of radiation hepatitis in two out of 117 consecutive lymphoma cases treated with total abdominal irradiation. These two patients developed clinically overt ma...

    journal_title:Clinical radiology

    pub_type: 杂志文章


    authors: Kim TH,Panahon AM,Friedman M,Webster JH

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  • Computed tomography appearances of sclerosing encapsulating peritonitis.

    abstract::Sclerosing encapsulating peritonitis (SEP) is a serious complication of peritoneal dialysis (PD) characterized by thickened peritoneal membranes, which lead to decreased ultra-filtration and intestinal obstruction. Its early clinical features are nonspecific, and it is often diagnosed late following laparotomy and per...

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    authors: Smith MA

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    journal_title:Clinical radiology

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    authors: Ganeshan B,Skogen K,Pressney I,Coutroubis D,Miles K

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    authors: Hawnaur JM,Reynolds K,Wilson G,Hillier V,Kitchener HC

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    authors: Eustace S,Suojanen J,Buff B,McEniff N,Januario J,Norris C

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