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Palackdkharry CS, Wottrich S, Dienes E, Bydon M, Steinmetz MP, Traynelis VC. The leptomeninges as a critical organ for normal CNS development and function: First patient and public involved systematic review of arachnoiditis (chronic meningitis). PLoS One 2022; 17:e0274634. [PMID: 36178925 PMCID: PMC9524710 DOI: 10.1371/journal.pone.0274634] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 08/31/2022] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND & IMPORTANCE This patient and public-involved systematic review originally focused on arachnoiditis, a supposedly rare "iatrogenic chronic meningitis" causing permanent neurologic damage and intractable pain. We sought to prove disease existence, causation, symptoms, and inform future directions. After 63 terms for the same pathology were found, the study was renamed Diseases of the Leptomeninges (DLMs). We present results that nullify traditional clinical thinking about DLMs, answer study questions, and create a unified path forward. METHODS The prospective PRISMA protocol is published at Arcsology.org. We used four platforms, 10 sources, extraction software, and critical review with ≥2 researchers at each phase. All human sources to 12/6/2020 were eligible for qualitative synthesis utilizing R. Weekly updates since cutoff strengthen conclusions. RESULTS Included were 887/14286 sources containing 12721 DLMs patients. Pathology involves the subarachnoid space (SAS) and pia. DLMs occurred in all countries as a contributor to the top 10 causes of disability-adjusted life years lost, with communicable diseases (CDs) predominating. In the USA, the ratio of CDs to iatrogenic causes is 2.4:1, contradicting arachnoiditis literature. Spinal fusion surgery comprised 54.7% of the iatrogenic category, with rhBMP-2 resulting in 2.4x more DLMs than no use (p<0.0001). Spinal injections and neuraxial anesthesia procedures cause 1.1%, and 0.2% permanent DLMs, respectively. Syringomyelia, hydrocephalus, and arachnoid cysts are complications caused by blocked CSF flow. CNS neuron death occurs due to insufficient arterial supply from compromised vasculature and nerves traversing the SAS. Contrast MRI is currently the diagnostic test of choice. Lack of radiologist recognition is problematic. DISCUSSION & CONCLUSION DLMs are common. The LM clinically functions as an organ with critical CNS-sustaining roles involving the SAS-pia structure, enclosed cells, lymphatics, and biologic pathways. Cases involve all specialties. Causes are numerous, symptoms predictable, and outcomes dependent on time to treatment and extent of residual SAS damage. An international disease classification and possible treatment trials are proposed.
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Affiliation(s)
| | - Stephanie Wottrich
- Case Western Reserve School of Medicine, Cleveland, Ohio, United States of America
| | - Erin Dienes
- Arcsology®, Mead, Colorado, United States of America
| | - Mohamad Bydon
- Department of Neurologic Surgery, Orthopedic Surgery, and Health Services Research, Mayo Clinic School of Medicine, Rochester, Minnesota, United States of America
| | - Michael P. Steinmetz
- Department of Neurological Surgery, Cleveland Clinic Lerner College of Medicine Neurologic Institute, Cleveland, Ohio, United States of America
| | - Vincent C. Traynelis
- Department of Neurosurgery, Rush University School of Medicine, Chicago, Illinois, United States of America
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Wheat J, Myint T, Guo Y, Kemmer P, Hage C, Terry C, Azar MM, Riddell J, Ender P, Chen S, Shehab K, Cleveland K, Esguerra E, Johnson J, Wright P, Douglas V, Vergidis P, Ooi W, Baddley J, Bamberger D, Khairy R, Vikram H, Jenny-Avital E, Sivasubramanian G, Bowlware K, Pahud B, Sarria J, Tsai T, Assi M, Mocherla S, Prakash V, Allen D, Passaretti C, Huprikar S, Anderson A. Central nervous system histoplasmosis: Multicenter retrospective study on clinical features, diagnostic approach and outcome of treatment. Medicine (Baltimore) 2018; 97:e0245. [PMID: 29595679 PMCID: PMC5895412 DOI: 10.1097/md.0000000000010245] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Central nervous system (CNS) involvement occurs in 5 to 10% of individuals with disseminated histoplasmosis. Most experience has been derived from small single center case series, or case report literature reviews. Therefore, a larger study of central nervous system (CNS) histoplasmosis is needed in order to guide the approach to diagnosis, and treatment.A convenience sample of 77 patients with histoplasmosis infection of the CNS was evaluated. Data was collected that focused on recognition of infection, diagnostic techniques, and outcomes of treatment.Twenty nine percent of patients were not immunosuppressed. Histoplasma antigen, or anti-Histoplasma antibodies were detected in the cerebrospinal fluid (CSF) in 75% of patients. One year survival was 75% among patients treated initially with amphotericin B, and was highest with liposomal, or deoxycholate formulations. Mortality was higher in immunocompromised patients, and patients 54 years of age, or older. Six percent of patients relapsed, all of whom had the acquired immunodeficiency syndrome (AIDS), and were poorly adherent with treatment.While CNS histoplasmosis occurred most often in immunocompromised individuals, a significant proportion of patients were previously, healthy. The diagnosis can be established by antigen, and antibody testing of the CSF, and serum, and antigen testing of the urine in most patients. Treatment with liposomal amphotericin B (AMB-L) for at least 1 month; followed by itraconazole for at least 1 year, results in survival among the majority of individuals. Patients should be followed for relapse for at least 1 year, after stopping therapy.
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Affiliation(s)
| | - Thein Myint
- University of Kentucky School of Medicine, Lexington, Kentucky
| | - Ying Guo
- Emory University Rollins School of Public Health
| | - Phebe Kemmer
- Emory University Rollins School of Public Health
| | | | - Colin Terry
- Indiana University Health, Indianapolis, Indiana
| | - Marwan M. Azar
- Yale University School of Medicine, New Haven, Connecticut
| | - James Riddell
- University of Michigan Health System, Ann Arbor, Michigan
| | - Peter Ender
- St. Luke's University Hospital and Health Network, Bethlehem
| | - Sharon Chen
- Stanford University School of Medicine, Stanford
| | | | | | | | - James Johnson
- Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Patty Wright
- University of California at San Francisco School of Medicine, San Francisco
| | - Vanja Douglas
- University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | | | - Winnie Ooi
- Lahey Hospital and Medical Center, Burlington, Massachusetts
| | - John Baddley
- University of Alabama- Birmingham, Birmingham, Alabama
| | | | - Raed Khairy
- Sparks Center for Infectious Diseases, Fort Smith, Arkansas
| | | | | | | | - Karen Bowlware
- University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | | | - Juan Sarria
- University of Texas Medical Branch, Galveston
| | | | - Maha Assi
- Infectious Disease Consultants, Wichita, Kansas
| | | | - Vidhya Prakash
- Southern Illinois University School of Medicine, Springfield, Illinois
| | - David Allen
- Courage Fund, National University of Singapore, Singapore
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