Anıl Özgür1, Kaan Esen. 1. Department of Radiology, Faculty of Medicine, Mersin University, 34. Cadde, Çiftlikköy Kampüsü, 33343, Mersin, Turkey, anilozgur@yahoo.com.
Abstract
PURPOSE: The petrosphenoidal ligament (PSL) forms the roof of Dorello's canal in which the abducens nerve courses. An ossified PSL may play a role in abducens nerve palsy although it is controversial. Therefore, we aimed to investigate the incidence and the imaging features of PSL ossification using multidetector computed tomography (MDCT). MATERIALS AND METHODS: Consecutive head CT scans, performed between January 2014 and May 2014, were retrospectively evaluated by two radiologists to look for a partial or complete ossification at the expected site of the PSL using axial, reformatted coronal and sagittal images. RESULTS: We found 46 patients (32 men, 14 women) with ossification of the PSL out of 523 head CT scans (46/523, 8.8%). A total of 61 PSL ossifications (31 unilateral; 15 bilateral) were found in 1,046 petroclival regions (61/1,046, 5.8%). Of these 61 ossifications, 34 (34/523, 6.5%) were on the right and 27 (27/523, 5.1%) were on the left; 38 (38/1,046, 3.6%) were classified as partial and 23 (23/1,046, 2.2%) were classified as complete. CONCLUSION: Ossification of the PSL is not a rare finding on MDCT. This imaging technique can reliably demonstrate the imaging features of an ossified PSL.
PURPOSE: The petrosphenoidal ligament (PSL) forms the roof of Dorello's canal in which the abducens nerve courses. An ossified PSL may play a role in abducens nerve palsy although it is controversial. Therefore, we aimed to investigate the incidence and the imaging features of PSL ossification using multidetector computed tomography (MDCT). MATERIALS AND METHODS: Consecutive head CT scans, performed between January 2014 and May 2014, were retrospectively evaluated by two radiologists to look for a partial or complete ossification at the expected site of the PSL using axial, reformatted coronal and sagittal images. RESULTS: We found 46 patients (32 men, 14 women) with ossification of the PSL out of 523 head CT scans (46/523, 8.8%). A total of 61 PSL ossifications (31 unilateral; 15 bilateral) were found in 1,046 petroclival regions (61/1,046, 5.8%). Of these 61 ossifications, 34 (34/523, 6.5%) were on the right and 27 (27/523, 5.1%) were on the left; 38 (38/1,046, 3.6%) were classified as partial and 23 (23/1,046, 2.2%) were classified as complete. CONCLUSION: Ossification of the PSL is not a rare finding on MDCT. This imaging technique can reliably demonstrate the imaging features of an ossified PSL.
Authors: Juan Barges-Coll; Juan Carlos Fernandez-Miranda; Daniel M Prevedello; Paul Gardner; Victor Morera; Ricky Madhok; Ricardo L Carrau; Carl H Snyderman; Albert L Rhoton; Amin B Kassam Journal: Neurosurgery Date: 2010-07 Impact factor: 4.654
Authors: Giorgio Iaconetta; Mario Fusco; Luigi M Cavallo; Paolo Cappabianca; Madjid Samii; Manfred Tschabitscher Journal: Neurosurgery Date: 2007-09 Impact factor: 4.654