DOI: 10.21276/aimdr.2019.5.3.OR2 Original Article ISSN (O):2395-2822; ISSN (P):2395-2814 Annals of International Medical and Dental Research, Vol (5), Issue (3) Page 5 Section: Orthopaedics MRI Spectrum of Symptomatic and Non –Symptomatic Tarlov Cyst: Series of Seven Cases in Orthopaedic Management Point of View. Viney Kumar Govila 1 , Naresh Chander Arora 2 , Hira Lal Kakriya 3 , Meghna Varma 4 , Nitish Virmani 5 , B B Sharma 6 1 Assistant Professor, Department of Orthopedics, SGT Medical College, Gurugram (Haryana) 122505. 2 Professor, Department of Orthopedics, SGT Medical College Budhera (Gurgaon) 122505. 3 Professor & HOD, Department of Orthopedics, SGT Medical College Budhera (Gurgaon) 122505. 4 Post Graduate MD Radiodiagnosis, Department of Radio-diagnosis, SGT Medical College Budhera (Gurgaon) 122505. 5 Assistant Professor, Faculty of Allied Health Sciences, SGT University, Gurgaon (Haryana). 6 Professor & Head, Dept.of Radio-diagnosis,SGT Medical College Budhera (Gurgaon) 122505. Received: March 2019 Accepted: March 2019 Copyright: © the author(s), publisher. Annals of International Medical and Dental Research (AIMDR) is an Official Publication of “Society for Health Care & Research Development”. It is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non- commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. INTRODUCTION Tarlov cyst is a perineural CSF filled cyst which is having the neve root within it. These are the meningeal dilatation with CSF present on the dorsal nerve root. These can be differentiated from pure meningeal cysts because of their nerve fibre walls. These are responsible for various myelopathies depending upon size, shape,outline and their extension in the surrounding anatomical structures. These affects the dorsal roots and produce symptomatology accordingly. These cysts were named after the renowned neurorologist Isadore M Tarlov. He studied thirty cadaveric filum terminale in 1938 at Montreal Neurological Institute to describe these type of perineural cysts. [1] MATERIALS AND METHODS There were seven patients (n=7) who were found to be having these perineural cysts during the MRI scanning of lumbosacral region. Five patients were male (71.4%) and two female (28.6%) in the age Name & Address of Corresponding Author Dr. B B Sharma Professor & Head, Department of Radio-diagnosis, SGT Medical College Budhera (Gurgaon) 122505 C 35 First Floor, Anand Niketan, New Delhi - 110021 ABSTRACT Background: Tarlov cysts are perineural cysts and are usually found in sacral region. The dorsal nerve root is encased in this type of the cyst. These may or may not be with any of the symptomatology. The entity is infrequently found as an incidental finding. These are cerebrospinal fluid (CSF) filled sacs which are diagnosed on cross sectional imaging modalities especially in magnetic resonance imaging (MRI). Tarlov cysts can cause different type of myelopathies as per their location and size. Methods: We present a series of seven cases where these perineural cysts were found during the routine imaging of lumbosacral spine. All these patients had undergone Magnetic Resonance Imaging (MRI) of lumbosacral spine for backache or some other pelvic complaints. In one case Computerized Tomography (CT) Myelography also helped in diagnosis and related bone remodeling.MR myelography adds to the delineation of CSF wrapping around the spinal cord. Results: Three patients were found to be symptomatic and the intensity of complaints corresponded to the size and location of the cysts. In our three cases, the etiopathogenesis also corresponded to the underlying development of these entities. Four patients were asymptomatic as the size of these cysts were small and not contributing to the complaints of the patient. Conclusion: MRI is the best modality to diagnose these perineural cysts which are responsible for different types of myelopathies .T2WI sequences in non contrast MRI studies are the best in delineating the size, shape, outline and location of these cysts. This also further elaborates their extension to the surrounding regions.MR myelography is adjuvant to more morphological features of these cysts. Keywords: Tarlov cyst; CSF; MRI; CT Myelography; myelopathies.