High Resolution Computed Tomography Evaluation of Temporal Bone Lesions

Shankhwar, Amit; Dixit, Yogita; Shukla, Dr.Prachi; Nagar, Arun

doi:10.21276/sjams.2016.4.7.29

Cited by 3 publications

(6 citation statements)

References 5 publications

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“…HRCT accurately predicted 94% of cases of incus erosion. Incus is the most eroded ossicle in our study similar to reports by Amit Shankhwar et al 13 and Rohit Vallabhaneni et al 14 Sonika Kanotra et al 15 Datta et al 16 and Rai et al 17 observed slightly low sensitivity of 87% and 85%. HRCT accurately predicted in 43% of cases of malleus erosion which was found to be eroded intraoperatively as well.…”

Section: Discussionsupporting

confidence: 90%

“…Sandeep Sreedhar et al 5 and Mehrdad Rocha et al 18 reported poor radiologic-surgical correlation in stapes erosion and stated that the small size of the bone may be the cause in poor detection by HRCT. Scutum erosion was accurately predicted in 91% of cases similar to Gaurano et al 19 and Chakenahalli P et al, Sandeep Sreedhar, et al 5 , Rocher et al 20 and Dr Amit Shankhwar et al 13 In contrast, Sunitha M et al 21 reported no correlation for scutum erosion. Suat Keskin et al 22 described that differences in imaging and intraoperative findings may be due to inappropriate angles of the coronal sections, partial volume effects of the soft tissues.…”

Section: Discussionsupporting

confidence: 52%

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High Resolution CT Imaging in Pathologies of Temporal Bone

Chidambaram¹,

R²,

Vinayagam³

et al. 2019

IJCMSR

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This was a prospective study, done in our institution from January 2016 to August 2017 with a sample size of 90, after due clearance from the institutional ethical committee. Written informed consent was obtained from all patients prior to the study procedure or data collection. Patients of all age group with ear complaints, such as hearing loss, pain, vertigo, ear discharge and tinnitus referred for HRCT temporal bone were included. Patients with a recent history A B S T R A C T Introduction: Diseases of the ear are a common clinical problem, encountered in every day. Clinical examination alone is not sufficient in present days, owing to prevalence, complications and recurrence of various pathologies of the temporal bone, imaging plays a major role in the management and influences the treatment. High-resolution computed tomography (HRCT) offers an excellent resolution, allowing a better understanding of the aetiology, pathology, disease course with early detection of complications. The prospective study aimed to study pathologies of the temporal bone along with their complications on HRCT and to correlate with their surgical findings. Material and Methods: A prospective study done with a sample size of 90 patients with ear complaints, such as hearing loss, pain, vertigo, ear discharge and tinnitus and referred for HRCT temporal bone were included. Ear trauma and head injury, pregnant women and those unwilling to give consent were excluded. HRCT was done using a GE 128 Slice CT scanner and were followed up for surgical or medical methods of management. Images are reconstructed in the ultra-sharp bone algorithm for image reconstruction, analysed for reporting. The intraoperative findings such as middle ear soft tissue density, ossicular erosion, erosion of scutum, tegmen tympani and facial canal, fistulous communication between the middle ear and lateral and posterior semicircular canal. Above findings were analyzed using standard statistical methods. Results: There is an excellent radio-surgical correlation in diagnosing and differentiating cholesteatoma from granulation tissue, identifying malleus erosion, incus erosion, tegmen tympani erosion, scutum erosion, EAC erosion, sigmoid plate dehiscence, high riding jugular bulb, mastoid status/erosion. Moderate to poor radio-surgical correlation was noted in identifying LSCC fistula, stapes erosion and facial canal erosion. Conclusion: HRCT is a valuable imaging modality through which pre-operative assessment of temporal bone pathologies can be done efficiently with reasonable accuracy, cost and precision for making surgical decisions. Hence it helps the surgeon to decide the course of action in particular clinical problem.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 52%

High Resolution CT Imaging in Pathologies of Temporal Bone

Chidambaram¹,

R²,

Vinayagam³

et al. 2019

IJCMSR

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“…Similar findings was reported byBagul, (2016) 9 who observed that temporal bone pathologies were more common in male where the gender ratio male:female was 2:1 which closely resembles with the present study.Similarl male predominance was also observed by Jyothi&Shrikrishna (2016), Shankhwar et al (2016) and Viastarakos et al (2012). 12,10,13 In HRCT findings it was observed in this present series that majority (96.9%) patients had soft tissue lesion, followed by 29.2.8% opacified mastoid, 27.7% ossicular and scutum erosion, 4.6% Erosion of tympanic wall, 10.8% erosion of tegmen tympani, 4.6% erosion of vestibule and facial canal and 3.1% erosion of sigmoid sinus plate and 3.1% erosion of lateral semicircular canal. Findings were comparable to the study conducted byBagul (2016)9 which showed thecommon HRCT findings in the cholesteatoma was soft tissue lesion in 100% followed by ossicular and scutum erosion 95%, erosion of tympanic wall 90%, opacified mastoid 57%, erosion of sigmoid plate 42%, erosion of lateral semicircular canal wall and tegmentympanii 19% and erosion of vestibule and fascial canal 9.5%.Cholesteatoma may be associated with extratemporal and intracranial complications, and almost all the complications are usually secondary to bone destruction and infected cholesteatoma, observed by study of Mafee et al 1988).…”

supporting

confidence: 51%

“…14 Similar findings were observed in the studies of Shankhwar et al 2016;Sirigiri&Dwaraknath, 2011). 10,15 In this study it was observed that a total 2 cases were diagnosed as malignant lesion evaluated by CT diagnosis among them true positive 1 case, false positive 1 case, false negative not found and true negative 63 cases identified by histopathology. In this study it was observed that a total 52 cases were diagnosed as Inflammatory lesion identified by CT diagnosis among the true positive 50 cases, false positive 2 cases, false negative 3 and true negative 10 cases identified by histopathology.…”

mentioning

confidence: 78%

“…In this present study it was observed that, the validity test of CT scan in the evaluation for benign lesion had sensitivity 81. 10 found that HRCT is 100% sensitive and specific to know the type of mastoid pneumatisation. Sensitivity, specificity, PPV & NPV of HRCT in diagnosing CSOM (with cholesteatoma and mastoiditis) was found to be 100% each which was similar to our study.…”

mentioning

confidence: 99%

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Role of High-resolution computed tomography (HRCT) in the detection of temporal bone pathology with Histopathological correlation

Showkat

Ahsan²,

Gafoor

et al. 2023

Anwer Khan Mod Med Coll J

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Background & objective: Pathology of ear is the third most common reason of visiting an Otorhinolaryngologist. Imaging plays an important role, especially in complicated and recurrent conditions and influence the treatment.Because of complicated anatomy radiographic assessment of temporal bone is difficult. An HRCT scan is useful for detail anatomical evaluation, assessment of different pathology, determining the extension and site of cholesteatoma and its sac, assessing the ossicles, evaluating the facial nerve, tegmen and sinus plate, and determining dural, sigmoid sinus, and jugular bulb positions. It is excellent in accurate assessment of pathology prior to surgical exploration regarding location, extent and complication of the disease. Method: A cross sectional study was carried out in the Department of Radiology and Imaging, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka in collaboration with the Department of Pathology and Department of ENT of BSMMU and ENT and Head Neck Cancer Hospital, Dhaka, during December 2016 to November 2017, to evaluate the extent of middle ear infections, benign and neoplastic conditions involving temporal bone according to compartment involved.For this purpose, a total of 65 patients having symptoms related to temporal bone pathology was included in this study. HRCT was done for every patient. HRCT findings and diagnoses of the pathologies were then correlated with the histopathological reports. Consecutive type of purposive sampling method was used in this study. Result: There was mild male preponderance.Majority (96.9%) patients had soft tissue lesion evaluated .by high-resolution computed tomography (HRCT) findings. Predominant findings are inflammatory, 52(80.0%) of the patients , followed by 11(16.9%) benign and 2(3.1%) malignant lesions. In histopathological evaluation 53(81.5%) of the patients had Inflammatory condition, followed by 11 (16.9%) benign and 1(1.5%) malignant lesions. The validity test of CT scan in the evaluation for benign lesion had sensitivity 81.8%, specificity 96.3%, accuracy 93.8% and positive predictive values 81.8% and negative predictive value 96.3%. CT in the evaluation for malignant lesion had sensitivity 100.0%, specificity 96.9%, accuracy 96.9%, positive predictive values 33.3% and negative predictive values 100.0%. CT in the evaluation for inflammatory lesion had sensitivity 94.3%, specificity 83.3%, accuracy 92.3%, positive predictive values 96.2% and negative predictive values 76.9%. Conclusion: In this study we found significant correlation between the histopathological diagnosis and HTCT of temporal bone pathology, where the validity tests are higher in evaluation of malignant lesion followed by inflammatory and benign. So it can be concluded that the high-resolution computed tomography is a useful diagnostic modality which enables characterization of a wide range of temporal bone pathology and can be used as a reliable tool. AKMMC J 2021; 12(2): 91-97

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High-resolution computed tomography for evaluation of temporal bone diseases

Pokhrel,

Chaudhary,

Bir Shrestha

et al. 2024

IJRRT

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This cross-sectional study intends to evaluate the extent of middle ear infections and benign and neoplastic conditions involving temporal bone according to the compartment involved. For this purpose, a total of 65 patients with symptoms related to temporal bone pathology referred to the Department of Radiology and Imaging were included in this study after approval from the Institutional Review Board. Patients with electric devices at the skull base, such as cochlear implants, un-cooperative patients, patients with a history of trauma, those with congenital lesions, and patients who didn’t give consent were excluded from the study. Almost half of the patients were aged 31-40 years, and male to female ratio was 1.6:1. Regarding the signs and symptoms, all patients had deafness, followed by 73.8% otorrhea and 67.7% tinnitus. In the High-Resolution Computed Tomography (HRCT) evaluation, 80.0% of the patients had inflammatory, followed by 16.9% benign and 3.1% malignant lesions. The validity test of the CT scan in the evaluation for benign lesions had a sensitivity of 81.8%, specificity of 96.3%, accuracy of 93.8%, positive predictive values of 81.8%, and negative predictive value of 96.3%. HRCT in the evaluation for malignant lesions had a sensitivity of 100.0%, specificity of 96.9%, accuracy of 96.9%, positive predictive values of 33.3%, and negative predictive values of 100.0%. HRCT in the evaluation for inflammatory lesions had a sensitivity of 94.3%, specificity of 83.3%, accuracy of 92.3%, positive predictive values of 96.2%, and negative predictive values of 76.9%.

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High Resolution Computed Tomography Evaluation of Temporal Bone Lesions

Cited by 3 publications

References 5 publications

High Resolution CT Imaging in Pathologies of Temporal Bone

High Resolution CT Imaging in Pathologies of Temporal Bone

Role of High-resolution computed tomography (HRCT) in the detection of temporal bone pathology with Histopathological correlation

High-resolution computed tomography for evaluation of temporal bone diseases

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