Cerebellopontine angle lipoma in asymptomatic patients: case report

Figueiredo, Ricardo Rodrigues; Azevedo, Andréia Aparecida de; Figueiredo, João Alfredo de Mesquita Rodrigues; Penido, Norma de Oliveira

doi:10.1016/j.bjorl.2015.10.003

Cited by 3 publications

(4 citation statements)

References 3 publications

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“…Lipomas of the CPA/IAC are extremely rare, with only 96 manuscripts reporting 202 CPA/IAC Lipomas prior to this study, and create a diagnostic dilemma for the surgeon, as these lesions may be mistaken for other, more common tumors of the CPA/IAC—for example, vestibular schwannomas, epidermoid cysts, meningiomas, arachnoid cysts, dermoid cysts, and hemangiomas 3,11 . Although lipomas characteristically appear as hypodense masses on computed tomography (CT) imaging, magnetic resonance imaging (MRI) enables improved evaluation of the mass for more accurate diagnostic assessment 12–14 . Lipomas appear hyperintense on pre‐ and postcontrast T1‐weighted MRI and have a high degree of variance on T2‐weighted MRI and do not enhance with contrast 15 .…”

Section: Discussionmentioning

confidence: 99%

“…3,11 Although lipomas characteristically appear as hypodense masses on computed tomography (CT) imaging, magnetic resonance imaging (MRI) enables improved evaluation of the mass for more accurate diagnostic assessment. [12][13][14] Lipomas appear hyperintense on pre-and postcontrast T1-weighted MRI and have a high degree of variance on T2-weighted MRI and do not enhance with contrast. 15 Fat suppression may be used to further distinguish lipomas from other lesions, particularly in cases where lipomas may have a lower fat content.…”

Section: Discussionmentioning

confidence: 99%

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Cerebellopontine Angle and Internal Auditory Canal Lipomas: Case Series and Systematic Review

et al. 2021

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Objectives/Hypothesis Cerebellopontine angle (CPA) and internal auditory canal (IAC) lipomas are rare, benign tumors comprising 0.08% of all intracranial tumors and can be mistaken for other, more common lesions of the CPA/IAC such as vestibular schwannoma. The purpose of this study was to review the literature and assess the evolution of CPA/IAC lipoma diagnosis and management. In addition, we present 17 new lipomas, matching the largest known case series of this rare tumor. Study Design Retrospective case series and systematic review. Methods Systematic review of the literature was performed using PubMed and Google Scholar. References from identified articles were also reviewed to identify potential additional manuscripts. Manuscripts and abstracts were reviewed to identify unique cases. For the case series, the charts of all CPA/IAC lipoma patients seen at a single institution from 2006–2019 were manually reviewed. Logistic regression and chi‐squared analysis were performed where appropriate. Results A total of 219 unique lipomas have been reported in the literature, including 17 presented in this study. Surgical management has been performed in 46% of cases and has been conducted less often in recent decades, likely due to improved radiographic diagnostic capabilities and understanding of surgical outcomes. Surgical management is associated with worse neurologic outcomes (P = .002) and has become less common in recent decades. Although growth is unlikely, it has been demonstrated in patients into their 30s. Conclusions Accurate radiographic diagnosis is imperative for appropriate patient management, as CPA/IAC lipomas should typically be managed through observation and serial imaging whereas vestibular schwannomas and other CPA/IAC lesions may require microsurgical or radiosurgical intervention depending on growth and symptomatology. Laryngoscope, 131:2081–2087, 2021

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Cerebellopontine Angle and Internal Auditory Canal Lipomas: Case Series and Systematic Review

et al. 2021

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“…Most intracranial lipomas tend to be midline, supratentorial, and involve the corpus callosum [ 5 , 9 - 10 ]. CPA lipomas comprise approximately 10% of intracranial lipomas, 0.14-0.15% of CPA tumors, and 0.1-0.5% of intracranial tumors overall [ 5 , 7 , 11 - 12 ].…”

Section: Reviewmentioning

confidence: 99%

“…As a result, when lipomas are viewed using CT, they appear as hypodense masses (-40 to -100 Hounsfield units (HU)) and do not enhance with contrast administration [ 7 , 22 ]. An MRI with contrast is the current standard of care when working up a patient with a CPA mass [ 8 , 12 , 23 ]. On a T1-weighted MRI, lipomas are hyperintense, whereas on T2-weighted sequences, the appearance of a lipoma can vary from hypointense to hyperintense [ 4 , 23 ].…”

Section: Reviewmentioning

confidence: 99%

Diagnostic Dilemma: Cerebellopontine Angle Lipoma Versus Dermoid Cyst

Bertot

Steele

Boghani

et al. 2017

Cureus

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Both lipomas and dermoid cysts of the cerebellopontine angle are rare tumors. These tumors differ in their embryological origin but share similar features on imaging. Both of these congenital lesions can be found in the cerebellopontine angle (CPA), and symptomatic clinical presentation is dictated by the location of the lesion. This paper demonstrates a unique case in which a CPA lipoma was misidentified as a dermoid cyst, leading to surgical intervention. Further, the paper provides a literature review of CPA lipomas and dermoid cysts to aid readers in further differentiating between these two unique tumors.

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