caa a22 4500 606213678 CHVBK 20210128101048.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s00701-015-2425-5 doi (NATIONALLICENCE)springer-10.1007/s00701-015-2425-5 Intradural communication between dorsal rootlets of spinal nerves: their clinical significance [Elektronische Daten] [Bilgehan Solmaz, Necati Tatarlı, Davut Ceylan, Evren Keleş, Safiye Çavdar] Background: Anatomical and surgical textbooks give almost no attention to the intradural communications between dorsal rootlets of adjacent spinal nerves. These communications can be of significance in various neurosurgical procedures and clinical conditions of the region. Methods: The spinal cord of six formaldehyde-fixed cadavers was dissected from C1-S5. The dorsal rootlets of the spinal nerves were exposed via a posterior approach and communications between adjacent spinal nerves were documented. Results: The frequency of communication between adjacent dorsal rootlets of the spinal nerves showed variations among spinal levels. Thirty-eight dorsal rootlet communications were observed in six cadavers (12 sides) and 20 (52.6%) were at cervical levels, 14 (36.8%) at thoracic levels, and four (10.5%) at lumbar levels. The majority of communications were observed on the left side (65.8%). Communications were most frequently observed at cervical (C4-C5, C5-C6) and upper thoracic (T1-T2) levels and seen least frequently at lower thoracic and lumbar levels. No communications were observed at sacral levels. Five types of communication were observed: I. oblique ascending, II. oblique descending III. short Y, IV. long Y and V shaped. None of the communication extended beyond one segment at any spinal level. The occurrence of such dorsal rootlet communications ranged from 3 to 7 for each cadaver and the mean was 4.8 ± 1.3. Histological sections from various levels of the dorsal rootlet communications showed that all consisted of myelinated fibers of varying diameters. Conclusions: Such communications may lead to misinterpretation of the pathology on the basis of clinical signs and symptoms and also should be considered in rhizotomy. Springer-Verlag Wien, 2015 Communication nationallicence Dorsal rootlet nationallicence Variations nationallicence Clinical significance nationallicence Solmaz Bilgehan Department of Neurosurgery, Istanbul Education and Research Hospital, Istanbul, Turkey aut Tatarlı Necati Department of Neurosurgery, Dr. Lutfi Kirdar Kartal Education and Research Hospital, Istanbul, Turkey aut Ceylan Davut Department of Neurosurgery, Sakarya University School of Medicine, Sakarya, Turkey aut Keleş Evren Department of Neurosurgery, Koç University School of Medicine, Istanbul, Turkey aut Çavdar Safiye Department of Anatomy, Koç University School of Medicine, Istanbul, Turkey aut Acta Neurochirurgica Springer Vienna 157/6(2015-06-01), 1069-1076 0001-6268 157:6<1069 2015 157 701 https://doi.org/10.1007/s00701-015-2425-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00701-015-2425-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Solmaz Bilgehan Department of Neurosurgery, Istanbul Education and Research Hospital, Istanbul, Turkey aut NATIONALLICENCE 700 1- Tatarlı Necati Department of Neurosurgery, Dr. Lutfi Kirdar Kartal Education and Research Hospital, Istanbul, Turkey aut NATIONALLICENCE 700 1- Ceylan Davut Department of Neurosurgery, Sakarya University School of Medicine, Sakarya, Turkey aut NATIONALLICENCE 700 1- Keleş Evren Department of Neurosurgery, Koç University School of Medicine, Istanbul, Turkey aut NATIONALLICENCE 700 1- Çavdar Safiye Department of Anatomy, Koç University School of Medicine, Istanbul, Turkey aut NATIONALLICENCE 773 0- Acta Neurochirurgica Springer Vienna 157/6(2015-06-01), 1069-1076 0001-6268 157:6<1069 2015 157 701