The black rim susceptibility sign in the MRI evaluation of intracranial colloid cysts

Sayah, Anousheh; Berkowitz, Frank E.; Thakkar, Rashmi S.

doi:10.1111/jon.12870

Cited by 2 publications

(2 citation statements)

References 17 publications

(21 reference statements)

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“…There are MR brain signs that can be utilized to systematically identify colloid cysts, such as T1-sequence hyperintense focus on MRI at the foramina of Monro. The "black rim susceptibility" sign on the susceptibility weighted imaging (SWI) sequence is a novel finding that can increase radiologists’ detection of colloid cysts in the MRI brain (Figure 2 ) [ 12 ]. Beyond the signs mentioned, future studies evaluating other potential imaging signs and techniques to detect colloid cysts could prove useful.…”

Section: Discussionmentioning

confidence: 99%

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Rate of Missed Intracranial Colloid Cysts on MRI and CT

Sharif,

DiGiacomo,

Czarniecki

et al. 2023

Cureus

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Background and purpose: Intracranial colloid cysts of the third ventricle are rare; however, they may be symptomatic. They can create a mass effect on the foramina of Monro, resulting in acute hydrocephalus. Colloid cysts are detectable on CT and MRI but are commonly missed. In this paper, we investigate the rate of missed colloid cysts on MRI and/or CT imaging within our multihospital metropolitan medical group. Materials and methods: A retrospective, institutional review board-approved search of the network-wide picture archiving and communication system (PACS) from January 1, 2010, to October 31, 2020, was performed to identify reports including a "colloid cyst" in MRI brain or CT head imaging. Results without imaging and/or surgical confirmation of intracranial colloid cysts were excluded, rendering 229 cases. A PACS review of these cases was performed by two neuroradiologists to determine instances where the cyst had previously been imaged but not diagnosed on either CT or MRI. Results: Two hundred twenty-nine subjects had confirmed colloid cysts through imaging and/or surgical reports. Of these, 46 had prior imaging depicting a colloid cyst either on CT and/or MRI without mention on the interpretative report, resulting in a non-detection rate of 20.1%. Conclusion: Intracranial colloid cysts can be missed at a considerably high rate, which is concerning given their clinically unpredictable nature and ability to cause significant morbidity and mortality. As such, it is important to take a proactive approach to searching for these cysts as part of a regular imaging search pattern and to continue to determine new methods of increasing detection sensitivity.

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Section: Discussionmentioning

confidence: 99%

“…These cysts are difficult to aspirate due to an increase in viscosity [ 11 ]. There have also been pilot studies that evaluated the "black rim susceptibility" sign on susceptibility weighted imaging (SWI) as a novel finding for the accurate diagnosis of colloid cysts [ 12 ].…”

Section: Introductionmentioning

confidence: 99%