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Patwardhan A, Mukherjee J, Mhatre R, Lanka V, Asranna A, Tiwari R, Sriram N, Kulanthaivelu K, Mahadevan A, Ramakrishnan S. Muscle MRI-Based Atrophy Pattern Recognition: Notable Findings in a Case of Pathologically Proven Lipid Storage Myopathy. Ann Indian Acad Neurol 2022; 25:1184-1187. [PMID: 36911427 PMCID: PMC9996520 DOI: 10.4103/aian.aian_447_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/22/2022] [Accepted: 06/24/2022] [Indexed: 11/06/2022] Open
Affiliation(s)
- Ameya Patwardhan
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Joydeep Mukherjee
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Radhika Mhatre
- Department of Neuropathology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Vivek Lanka
- Department of Neuroradiology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Ajay Asranna
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Ravindu Tiwari
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Neeharika Sriram
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Karthik Kulanthaivelu
- Department of Neuroradiology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Anita Mahadevan
- Department of Neuropathology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Subasree Ramakrishnan
- Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
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Kubihal V, Kundra V, Lanka V, Sharma S, Das P, Nayyar R, Das CJ. Prospective evaluation of PI-RADS v2 and quantitative MRI for clinically significant prostate cancer detection in Indian men – East meets West. Arab J Urol 2022; 20:126-136. [PMID: 35935908 PMCID: PMC9354636 DOI: 10.1080/2090598x.2022.2072141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Affiliation(s)
- Vijay Kubihal
- Department of Radiodiagnosis and Interventional Radiology, Urology All India Institute of Medical Sciences, New Delhi, India
| | - Vikas Kundra
- Department of diagnostic radiology, MD Anderson Cancer Center, Houston, Texas, USA
| | - Vivek Lanka
- Department of Radiodiagnosis and Interventional Radiology, Urology All India Institute of Medical Sciences, New Delhi, India
| | - Sanjay Sharma
- Department of Radiodiagnosis and Interventional Radiology, Urology All India Institute of Medical Sciences, New Delhi, India
| | - Prasenjit Das
- Department of Radiodiagnosis and Interventional Radiology, Urology All India Institute of Medical Sciences, New Delhi, India
| | - Rishi Nayyar
- Department of Radiodiagnosis and Interventional Radiology, Urology All India Institute of Medical Sciences, New Delhi, India
| | - Chandan J Das
- Department of Radiodiagnosis and Interventional Radiology, Urology All India Institute of Medical Sciences, New Delhi, India
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3
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Murumkar V, Peer S, Jabeen S, Chauhan RS, Saini J, Aravinda RH, Lanka V, Kulkarni GB. Contrast-Induced Encephalopathy - An Unusual Complication Following Endovascular Interventions in the Anterior Circulation. Ann Indian Acad Neurol 2021; 24:635-639. [PMID: 34728981 PMCID: PMC8513941 DOI: 10.4103/aian.aian_913_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 08/30/2020] [Accepted: 09/28/2020] [Indexed: 12/14/2022] Open
Affiliation(s)
- Vivek Murumkar
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Sameer Peer
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Shumyla Jabeen
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Richa S Chauhan
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Jitender Saini
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Ramalingaiah H Aravinda
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Vivek Lanka
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Girish B Kulkarni
- Department of Neurology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
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Konar SK, Kulkarni AV, Shukla D, Misra T, Devi BI, Peer S, Lanka V. Management Options for Suprasellar Cystic Craniopharyngioma: Endoscopic Transventricular Approach and Microsurgical Approach. J Neurosci Rural Pract 2021; 12:343-349. [PMID: 33927524 PMCID: PMC8064855 DOI: 10.1055/s-0041-1722839] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Objective
The treatment of cystic craniopharyngioma in children is varied. The treatment ranges from radical excision to direct radiotherapy. As the morbidity of excision is high, more conservative approaches are used. Transventricular endoscopy is a minimally invasive treatment for cystic craniopharyngiomas. The objective of this study is to compare the outcome of microscopic versus endoscopic transventricular approach for cystic craniopharyngioma.
Methods
This is a retrospective study of series of children managed with microscopic excision and endoscopic transventricular approach for suprasellar cystic craniopharyngiomas. Operative details, visual outcome, endocrinological outcome, tumor-related cyst recurrence rate, and complication were compared between microscopic and endoscopic groups.
Results
A total of 28 children underwent microscopic excision and 14 children underwent endoscopic procedure. The anesthesia time was significantly lower with endoscopic as compared to microscopic group (
p
= 0.0001) as well as blood loss during surgery (
p
= 0.0001). Hospital stay after surgery was shorter in endoscopic group. Incidence of diabetes insipidus was more in microscopic group (25%) compared to endoscopic group (7.14%). Visual outcome was almost same with approaches. Requirement of hormone replacement was more in microscopic group than in endoscopic group (
p
= 0.006). Incidence of cyst recurrence was more in microscopic (39.3%) compared to endoscopic group (7.7%).
Conclusion
Endoscopic transventricular approach is a safe alternative for initial treatment of suprasellar cystic craniopharyngioma in children.
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Affiliation(s)
- Subhas K Konar
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Akshay V Kulkarni
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Dhaval Shukla
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Tejesh Misra
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Bhagavatula Indira Devi
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Sameer Peer
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Vivek Lanka
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
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5
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Sebastian LJD, Ahuja C, Sekar S, Senthilvelan S, Kulanthaivelu K, Lanka V, Goel V, Mohapatra S, Jain C, Senthilkumaran S, Garg A, Balasundaram P, Kumar A, Kapil A, Kesavadas C, Gupta V. COVID-19: Indian Society of Neuroradiology (ISNR) Consensus Statement and Recommendations for Safe Practice of Neuroimaging and Neurointerventions. Neuroradiol J 2020; 33:353-367. [PMID: 32894991 PMCID: PMC7482040 DOI: 10.1177/1971400920946989] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The ongoing COVID-19 pandemic has forced every radiology set-up to evolve and formulate guidelines for day-to-day functioning. The sub-speciality of neuroradiology, both diagnostic and neuro-intervention, forms a very important part of any radiology or 'neuro-care' set-up. The present document is a consensus statement of the Indian Society of Neuroradiology, prepared after reviewing the available data and working experience. It scientifically tries to answer many questions faced by neuroradiologists everyday in practice. It encompasses simple things such as which patients need to be imaged, what precautions are essential, the work-flows, cleaning of radiology equipment, how to carry out neuro-interventions in COVID-suspect patients, and what procedures/tests to avoid, or their alternatives, to minimise the spread of COVID infection both to the patients and health care personnel. As radiology set-ups can be large, every sub-speciality may have certain precautions which will not be covered in general guidelines, and this document tries to answer those for neuroradiologists. Carefully evolved Standards of Operating Procedure (SOPs) and guidelines are the need of the hour to guide in providing uninterrupted and adequate services to the needy without compromising the safety of the specialised work force and facilities involved.
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Affiliation(s)
| | - Chirag Ahuja
- Department of Radiology, PGIMER, Chandigarh, India
| | - Sabarish Sekar
- Department of Imaging sciences and Intervention radiology, Sree Chitra Tirunal Institute for Medical Sciences & Technology, Thiruvananthapuram, India
| | - Santhakumar Senthilvelan
- Department of Imaging sciences and Intervention radiology, Sree Chitra Tirunal Institute for Medical Sciences & Technology, Thiruvananthapuram, India
| | | | - Vivek Lanka
- Department of Neuroimaging and Interventional Radiology, NIMHANS, Bangalore, India
| | - Vinay Goel
- Department of Neuroimaging and Interventional Neuroradiology, All India Institute of Medical Sciences, New Delhi, India
| | - Sarita Mohapatra
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Chirag Jain
- Department of Radiology, PGIMER, Chandigarh, India
| | - S. Senthilkumaran
- Department of Neuroimaging and Interventional Neuroradiology, All India Institute of Medical Sciences, New Delhi, India
| | - Ajay Garg
- Department of Neuroimaging and Interventional Neuroradiology, All India Institute of Medical Sciences, New Delhi, India
| | | | - Ajay Kumar
- Department of Radiology, PGIMER, Chandigarh, India
| | - Aarti Kapil
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Chandrasekharan Kesavadas
- Department of Imaging sciences and Intervention radiology, Sree Chitra Tirunal Institute for Medical Sciences & Technology, Thiruvananthapuram, India
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Kulanthaivelu K, Lanka V, Chandran C, Nandeesh BN, Tiwari S, Mahadevan A, Prasad C, Saini J, Bhat MD, Chakrabarti D, Pruthi N, Vazhayil V, Sadashiva N, Srinivas D. Microcystic Meningiomas: MRI-Pathologic Correlation. J Neuroimaging 2020; 30:704-718. [PMID: 32521093 DOI: 10.1111/jon.12743] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 05/26/2020] [Accepted: 05/26/2020] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND AND PURPOSE Microcystic meningiomas (MM) are a distinctive, rare subtype of Grade I meningiomas with limited radiological descriptions. We intend to identify unique imaging phenotypes and seek radiopathological correlations. METHODS Retrospective analysis of histopathologically proven MM was undertaken. Clinicodemographic profiles, imaging, and histopathological characteristics were recorded. Spearman rank correlations among radiological and pathological attributes were performed. RESULTS Twenty-eight cases were analyzed (mean age = 45.5 years; M:F = 1:1.54; mean volume = 50.1 mL; supratentorial n = 27). Most lesions were markedly T2 hyperintense (higher than peritumoral brain edema-a unique finding) (89.3%) and showed invariable diffusion restriction, severe peritumoral brain edema (edema index >2 in 64.3%), a "storiform" pattern on T2-weighted images (T2WI) (75%), reticular pattern on postcontrast T1 (78.6%)/diffusion-weighted images (DWI) (65.4%), hyperperfusion, T1 hypointensity (84.6%), and absence of blooming on susceptibility-weighted image (80.9%). Storiform/reticular morphology correlated with large cysts on histopathology (ρ = .56; P = .005753). Lesion dimension positively correlated with reticular morphology on imaging (ρ = .59; P = .001173), higher flow voids (ρ = .65; P = .00027), and greater microcystic changes on histopathology (ρ = .51; P = .006778). Peritumoral brain edema was higher for lesions demonstrating greater angiomatous component (ρ = .46; P = .014451). CONCLUSIONS We have elucidated varied neuroimaging features and highlighted pathological substrates of crucial imaging findings of MM. MM ought to be considered as an imaging possibility in an extra-axial lesion with a marked hypodensity on noncontrast computed tomography, markedly T2-hyperintense/T1-hypointense signal, and a storiform/reticular pattern on T2W/GdT1w//DWI.
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Affiliation(s)
- Karthik Kulanthaivelu
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Vivek Lanka
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Chitra Chandran
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Bevinhalli N Nandeesh
- Department of Neuropathology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Sarbesh Tiwari
- Department of Diagnostic and Interventional Radiology, All India Institute of Medical Sciences Jodhpur, Jodhpur, India
| | - Anita Mahadevan
- Department of Neuropathology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Chandrajit Prasad
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Jitender Saini
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Maya D Bhat
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Dhritiman Chakrabarti
- Department of Neuroanaesthesia and Neurocritical care, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Nupur Pruthi
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Vikas Vazhayil
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Nishanth Sadashiva
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Dwarakanath Srinivas
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, India
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7
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Baishya PP, Lanka V, Kulanthaivelu K, Saini J, Vengalil S. Outflow-Restricted Developmental Venous Anomaly Masquerading as a Tumefactive Lesion on Imaging. World Neurosurg 2020; 141:261-266. [PMID: 32461173 DOI: 10.1016/j.wneu.2020.05.165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 05/17/2020] [Accepted: 05/18/2020] [Indexed: 11/19/2022]
Abstract
BACKGROUND Developmental venous anomalies (DVA) are rarely symptomatic. We report an unusual case of outflow-restricted DVA presenting with seizures. CASE DESCRIPTION Expansile signal changes due to a hemorrhagic venous infarction in the draining territory of collector vein of DVA simulated a neoplasm. Follow-up imaging showed regression of mass effect and asymptomatic thrombosis of another distant vein. Investigation for prothrombotic conditions returned negative. CONCLUSIONS Atypical imaging findings in the draining territory of DVA ought to raise the possibility of outflow restriction.
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Affiliation(s)
- Priyanka Priyadarshini Baishya
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Vivek Lanka
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Karthik Kulanthaivelu
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India.
| | - Jitender Saini
- Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Seena Vengalil
- Department of Neurology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
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Clark E, Santiago F, Deng L, Chong S, de La Fuente C, Wang L, Fu P, Stein D, Denny T, Lanka V, Mozafari F, Okamoto T, Kashanchi F. Loss of G(1)/S checkpoint in human immunodeficiency virus type 1-infected cells is associated with a lack of cyclin-dependent kinase inhibitor p21/Waf1. J Virol 2000; 74:5040-52. [PMID: 10799578 PMCID: PMC110856 DOI: 10.1128/jvi.74.11.5040-5052.2000] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/1999] [Accepted: 02/28/2000] [Indexed: 12/21/2022] Open
Abstract
Productive high-titer infection by human immunodeficiency virus type 1 (HIV-1) requires the activation of target cells. Infection of quiescent peripheral CD4 lymphocytes by HIV-1 results in incomplete, labile reverse transcripts and lack of viral progeny formation. An interplay between Tat and p53 has previously been reported, where Tat inhibited the transcription of the p53 gene, which may aid in the development of AIDS-related malignancies, and p53 expression inhibited HIV-1 long terminal repeat transcription. Here, by using a well-defined and -characterized stress signal, gamma irradiation, we find that upon gamma irradiation, HIV-1-infected cells lose their G(1)/S checkpoints, enter the S phase inappropriately, and eventually apoptose. The loss of the G(1)/S checkpoint is associated with a loss of p21/Waf1 protein and increased activity of a major G(1)/S kinase, namely, cyclin E/cdk2. The p21/Waf1 protein, a known cyclin-dependent kinase inhibitor, interacts with the cdk2/cyclin E complex and inhibits progression of cells into S phase. We find that loss of the G(1)/S checkpoint in HIV-1-infected cells may in part be due to Tat's ability to bind p53 (a known activator of the p21/Waf1 promoter) and sequester its transactivation activity, as seen in both in vivo and in vitro transcription assays. The loss of p21/Waf1 in HIV-1-infected cells was specific to p21/Waf1 and did not occur with other KIP family members, such as p27 (KIP1) and p57 (KIP2). Finally, the advantage of a loss of the G(1)/S checkpoint for HIV-1 per se may be that it pushes the host cell into the S phase, which may then allow subsequent virus-associated processes, such as RNA splicing, transport, translation, and packaging of virion-specific genes, to occur.
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Affiliation(s)
- E Clark
- Department of Biochemistry and Molecular Biology, University of Medicine and Dentistry of New Jersey-New Jersey Medical School, Newark, New Jersey 07103, USA
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