Role of MRI in the evaluation of acoustic schwannoma and its comparison to histopathological findings

Haque, Salina; Hossain, Ahmed; Quddus, MA; Jahan, Mahmood Uz

doi:10.3329/bmrcb.v37i3.9120

Cited by 20 publications

(14 citation statements)

References 5 publications

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“…These radiological findings were well correlated with histopathological diagnosis. The results in our study were comparable to study done by Haque S et al (18) In their study the age range from 21-60 years and the mean age was 42.85 years. Highest incidence of Cerebellopontine Angle (CPA) mass (i.e.…”

Section: Discussionsupporting

confidence: 91%

Study of Posterior Fossa Tumors by High Resolution Mri

P¹,

J.S²,

Madhavi³

2016

jebmh

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INTRODUCTION Magnetic Resonance Imaging (MRI) is the imaging modality used for the assessment of infratentorial neoplasms. Although Computed Tomography (CT) provides better demonstration of small or subtle calcifications within tumors. OBJECTIVES Study is done to assess the potential of MRI in characterisation of different tumors in posterior fossa by evaluating various unenhanced and gadolinium enhanced sequences and to compare high resolution FSE MRI sequences with routine FSE MRI sequences in diagnosing posterior fossa brain tumors. Also correlate findings on Magnetic Resonance Imaging with Pathological diagnosis. MATERIALS AND METHODS A total of 52 patients were diagnosed by CT brain as having posterior fossa brain for a year of 2 years were included in the study. In all studies MR imaging was performed with a clinical 1.5 T system (General electrical medical systems). A dedicated phased-array coil was used. RESULTS The age group ranged from 1 year to 60 years, majority were between 1 to 20 years (39%). Slight male preponderance was seen (males 29, females 23). Commonest tumor encountered in our study was vestibular schwannoma. DWI alone can differentiate different pediatric posterior fossa brain tumors. One case of pilocytic astrocytoma showed solid lesion instead of typical cystic lesion with mural nodule. One case AT-RT showed 2 lesions one in cerebrum, one in CP angle. Common feature being intra-axial lesion involving cerebellum. MRI was able to predict diagnosis in 50 of the 52 tumors. CONCLUSION Magnetic Resonance Imaging was found to be a highly sensitive imaging procedure and method of choice for posterior fossa brain tumors.

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Section: Discussionsupporting

confidence: 91%

Study of Posterior Fossa Tumors by High Resolution Mri

P¹,

J.S²,

Madhavi³

2016

jebmh

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“…Haque S et al [24] in their study of role of MRI in the evaluation of acoustic schwannoma and its comparison to histopathological findings in 2011 found that the overall sensitivity of MRI to diagnose Acoustic Schwannoma was 96 % with specificity of 88.2 %, positive predictive value of 92.31 % and accuracy of 92.86 % which is consistent with the above study.…”

Section: Discussionsupporting

confidence: 77%

Role of Magnetic Resonance Imaging in Evaluation of Cerebellopontine Angle Schwannomas

Singh

Thukral

et al. 2014

Indian J Otolaryngol Head Neck Surg

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The aim of the present study was to evaluate the role of Magnetic Resonance Imaging (MRI) to localize and characterize the MR imaging features of cerebellopontine angle schwannomas and to compare with surgical/ histopathological findings. It was a prospective study which included 19 patients, who presented with signs and symptoms s/o any lesion in the CP angle and were referred to the radiology department for MRI. All patients included in the study were subjected to detailed clinical history and physical examination following which MRI was carried out on Philips Gyroscan Achieva 1.5 Tesla unit and the standard protocol consisted of T1WI, T2WI, DWI and FLAIR images in axial, sagittal and coronal planes. Hearing abnormality was the most common presenting complaint in patients with CP angle schwannoma's followed by headache and tinnitus. Vestibulocochlear nerve was the most commonly involved nerve in patients with these lesions followed by involvement of trigeminal nerve. MRI was erroneous in giving provisional diagnosis of schwannoma in one case, which on subsequent surgery and histopathology was found to be a meningioma. The sensitivity of MRI for correctly diagnosing vestibular schwannoma was 100 % and specificity was 92.86 % with a positive predictive value of 94.12 % and accuracy of 96.67 %. MRI is considered as an excellent noninvasive investigation for CP angle schwannoma's. It can identify the site and extension of the lesions as well as the characteristic signal. Apart from diagnosing, MR imaging plays an important role in stratifying patients into appropriate treatment options.

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“…These results are in concordance with the study conducted by Haque S et al which states that acoustic schwannomas account for nearly 70 -80% of all cerebellopontine angle lesions, followed next in frequency by meningioma and epidermoid cysts in the second and third position constituting 10 -15% and 5% of cerebellopontine angle tumours respectively. 13 The age of the patients in the present study ranged from 8 to 72 years with mean age of 51.9 +/-10.5 years which is in concordance to the study done by Mulkens and Osborn et al in which it was found that age range and mean range was 26 -80 years and 56.5 years respectively. Maximum number of cases were recorded in the age group of 51-60 years which is in accordance to previous studies stating that majority of cases are seen in people post 50 years of life.…”

Section: Discussionsupporting

confidence: 91%

Diagnostic Efficacy of MRI in the Evaluation of Cerebellopontine Angle Tumors

Amritha¹,

F²,

Parthasarathy³

et al. 2019

IJCMSR

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Introduction: Magnetic Resonance Imaging (MRI) has been the primary imaging modality and has revolutionized the imaging of brain tumours. MRI can display accurate multi planer imaging without interfering of adjacent structures especially for posterior fossa mass lesion. MRI is the imaging modality of choice for cerebollo-pontine (CP) angle Schwannoma. The aim of the current study was to assess the effectiveness of MRI in the evaluation of cerebellopontine angle lesions, with histopathology as gold standard in comparison and also to estimate the accuracy, sensitivity, specificity of MRI in the detection of cerebellopontine angle lesions. Material and Methods: This was a retrospective study which comprised of 50 patients with clinical suspicion of cerebellopontine angle lesions. The study duration was from June 2011 to March 2018 for imaging. Patients presented with signs and symptoms of any lesion in the CP angle were included in the study. Patients excluded from the study were those with contraindications to MRI and with history of previous surgical intervention. Results: In the present study, 22 were males and 28 were females. The age group of the patients ranged between 8 to 72 years. Majority of our patients were aged between 51-60 years. Out of 50 patients, 22 patients had acoustic schwannoma on MRI, 14 patients were diagnosed to have cerebellopontine angle meningioma, 8 patients had epidermoid cyst, 4 patients had arachnoid cyst and 2 patients had lipoma and metastasis respectively. Conclusion: MR imaging is the study of choice for the examination of the patient of cerebellopontine angle Schwannoma because of its high sensitivity especially after use of contrast material.

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Role of MRI in the evaluation of acoustic schwannoma and its comparison to histopathological findings

Cited by 20 publications

References 5 publications

Study of Posterior Fossa Tumors by High Resolution Mri

Study of Posterior Fossa Tumors by High Resolution Mri

Role of Magnetic Resonance Imaging in Evaluation of Cerebellopontine Angle Schwannomas

Diagnostic Efficacy of MRI in the Evaluation of Cerebellopontine Angle Tumors

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