Optic neuritis and paranasal sinus diseases

Open Medicine ◽  
2011 ◽  
Vol 6 (1) ◽  
pp. 117-119 ◽  
Author(s):  
P. Čelakovský ◽  
J. Vokurka ◽  
L. Školoudík ◽  
J. Růžička
Keyword(s):  
Optic Nerve ◽  
Optic Neuritis ◽  
Paranasal Sinus ◽  
Imaging Techniques ◽  
Rare Complication ◽  
Complete Recovery ◽  
Paranasal Sinus Diseases ◽  
Immediate Surgery ◽  
Relationship Of ◽  
The Relationship

AbstractThe relationship of sinusitis and paranasal sinus mucoceles to optic neuritis (ON) remains a challenge for both the otolaryngologist and the ophthalmologist. Currently, ON is assumed to be a rare complication of paranasal sinus diseases. Three new cases of ON associated with paranasal sinus diseases are described. We postulate different pathophysiologic mechanisms of ON in our three patients: compression of optic nerve due to sphenoid mucocele in the first patient; extension of bacterial infection to the optic nerve in the second patient; and invasion of aspergillosis to the orbital apex in the third patient. We assume that the complete recovery of the patient’s vision in the second case resulted from surgery, which had been performed immediately. A timely operation could possibly have prevented permanent blindness in cases 1 and 3 as well. Optic neuritis can occasionally be a complication of bacterial and mycotic sinusitis or paranasal sinus mucoceles, especially if located in the sphenoid sinus and posterior ethmoids. The evaluation of paranasal sinuses using imaging techniques is necessary to diagnose the problem, and immediate surgery can prevent permanent sequelae in indicated cases.

Endoscopic anatomy of the sphenoid sinus

1999 ◽  
Vol 113 (2) ◽  
pp. 122-126 ◽  
Author(s):  
Samy Elwany ◽  
Ibraheim Elsaeid ◽  
Hossam Thabet
Keyword(s):  
Optic Nerve ◽  
Carotid Artery ◽  
Sphenoid Sinus ◽  
Sella Turcica ◽  
Clinical Importance ◽  
Sinus Surgery ◽  
Endoscopic Anatomy ◽  
Relationship Of ◽  
The Relationship ◽  
Sphenoid Sinuses

AbstractThe anatomy of the sphenoid sinus, as it relates to endoscopic sinus surgery, was studied in 93 cadaver heads (186 sphenoid sinuses) using endoscopic dissections as well as sagittal sections. The relationship of the sphenoid sinuses to the carotid artery, optic nerve, floor of sella turcica, as well as other important structures, were verified and discussed. The recesses of the sinus as well as its ostium and accessory septa and crests were described and their clinical importance was discussed. Pertinent measurements were included wherever appropriate.

The Adventures of the Optic Nerve

2004 ◽  
Author(s):  
John Elderfield
Keyword(s):  
Optic Nerve ◽  
Art History ◽  
Modern Art ◽  
Historical Study ◽  
Visual Medium ◽  
Relationship Of ◽  
The Relationship

This chapter presents the text of a lecture on the role of visual medium in art-historical study. It addresses the relationship of art history to the existential acts of painting and looking at painting and describes how the so-called story of modern art has been narrated in the history literature. It also considers how modern histories can accommodate the unfamiliar that is normally part of the story.

Optic nerve involvement in posterior paranasal sinus diseases

1989 ◽  
Vol 9 (3) ◽  
pp. 147-155 ◽  
Author(s):  
Masashi Shimo-Oku ◽  
Shigeo Miyazaki ◽  
Kahoru Shiraki ◽  
Taeko Sugimoto ◽  
Haruyuki Sotani
Keyword(s):  
Optic Nerve ◽  
Paranasal Sinus ◽  
Paranasal Sinus Diseases ◽  
Nerve Involvement ◽  
Optic Nerve Involvement

scholarly journals Computed Tomography Image Analysis and Clinical Correlations of Retromaxillary Cells

2020 ◽  
pp. 014556132093696
Author(s):  
Cheng Cao ◽  
Fangwei Zhou ◽  
ZhiYan Song ◽  
Zezhang Tao ◽  
Yu Xu
Keyword(s):  
Computed Tomography ◽  
Paranasal Sinus ◽  
Maxillary Sinusitis ◽  
Anatomical Variation ◽  
Sinus Surgery ◽  
Tomography Image ◽  
Males And Females ◽  
Computed Tomography Image ◽  
Relationship Of ◽  
The Relationship

Objective: This study aimed to investigate and analyze the anatomic characteristics of the retromaxillary cell (RMC) by using computed tomography (CT) images of paranasal sinuses and to improve its identification with ethmomaxillary sinus (EMS). Methods: The paranasal sinus CT scans of 441 outpatients or inpatients in our hospital from January 2018 to October 2018 were analyzed. The incidence of RMC, EMS, Haller cell, imaging anatomical characteristics, and morphological manifestations were observed via sinus CTs. The relationship of RMC and ipsilateral maxillary sinusitis was analyzed. Results: The incidence of RMC is 83.90% (740/882). The incidence of males and females was 83.81% (414/494) and 84.02% (326/388), respectively. The incidence of bilateral (72.79%, 321/441) was much higher than that of unilateral (22.22%, 98/441). The lateral extension of the RMC ranged from 1.18 to 13.31 mm, with an average of 6.10 ± 2.03 mm. The incidence of ipsilateral maxillary sinus opacification on the RMC sides and non-RMC sides has no significance difference (χ2 = .054, P = .459). The incidence of Haller cell and EMS decreased significantly in the presence of RMC ( P < .01). Conclusion: The RMC is an anatomical variation originating from posterior ethmoid cells, which is commonly encountered in the clinic. The pneumatization of RMC is highly variable, and a bilateral is common. During endoscopic sinus surgery, it is necessary to carefully identify such an air cell to ensure the complete opening of the paranasal sinus during surgery.

scholarly journals On the relationship of diseases of the eye and lacrimal ducts with the pathology of the nose and its accessory cavities

2021 ◽  
Vol 32 (2-3) ◽  
pp. 212-215
Author(s):  
I. Kryindel
Keyword(s):  
Optic Nerve ◽  
Nasal Cavity ◽  
Relationship Of ◽  
The Relationship

Since the nasal cavity with the paranasal cavities is anatomically and topographically closely connected with the cavity of the orbit, the optic nerve and the lacrimal ducts, it is quite clear that certain pathological processes, both in the nasal cavity and in its sinuses, very often cause diseases eyes, sometimes very serious.

scholarly journals Pneumomediastinum complicating COVID-19: a case series

2021 ◽  
Vol 26 (1) ◽  
Author(s):  
Sérgio Henrique Bastos Damous ◽  
Jones Pessoa dos Santos Junior ◽  
Álvaro Vicente Alvarez Pezzano ◽  
Mohamad Abdul Majid Chams ◽  
Nathaly Haritov ◽  
...  
Keyword(s):  
Rare Complication ◽  
Ventilatory Support ◽  
Case Series ◽  
Pulmonary Involvement ◽  
Orotracheal Intubation ◽  
Case Presentation ◽  
History Of ◽  
Parenchymal Disease ◽  
Relationship Of ◽  
The Relationship

Abstract Background Pneumomediastinum is a rare complication of COVID-19 pneumonia, which may or may not be associated with invasive ventilatory support. Therefore, the report and findings associated with its evolution can be of great contribution in the management of this unknown disease. Case presentation Here, we present a series of four patients with severe pneumomediastinum requiring intensive care unit. These patients developed pneumomediastinum before or during orotracheal intubation (OTI) or without OTI. The four patients were three men and one woman with a mean age of 60.5 years (48–74 years). No patients had a known history of lung disease or traumatic events, except for one patient who had a history of smoking, but who was without parenchymal disease. All intubations were performed without complications. No cases of pneumomediastinum occurred after tracheostomy, and none of the patients had tomographic or bronchoscopic evidence of tracheal injury. Although the pneumomediastinum observed in our cases was apparently not related to a violation of the aerodigestive track, this complication was associated with a worse prognosis. Conclusion Pneumomediastinum is a rare complication of COVID-19 pneumonia, and the most likely etiopathogenesis is severe pulmonary involvement, which may or may not be associated with invasive ventilatory support. Future studies with a greater number of cases should elucidate the relationship of pneumomediastinum to a probable prognostic factor.

Significant Improvement of Visual Functions after Removal of an Intracranial Giant Optic Nerve Glioma Revealing Exophytic Growth: Case Report

Neurosurgery ◽  
2006 ◽  
Vol 58 (4) ◽  
pp. E792-E792 ◽  
Author(s):  
Zhiyong Tong ◽  
Masahiko Wanibuchi ◽  
Teiji Uede ◽  
Sumiyoshi Tanabe ◽  
Kazuo Hashi
Keyword(s):  
Optic Nerve ◽  
Neurofibromatosis Type 1 ◽  
Residual Tumor ◽  
Neurofibromatosis Type ◽  
Magnetic Resonance Images ◽  
Optic Nerve Glioma ◽  
Visual Functions ◽  
Relationship Of ◽  
The Relationship

Abstract OBJECTIVE AND IMPORTANCE: Intracranial giant optic nerve gliomas, usually presumed as optic chiasmatic gliomas, are much less common. The architectural tumor form of optic nerve glioma without neurofibromatosis type 1 is usually the expansile-intraneural pattern. The exophytic optic nerve gliomas without neurofibromatosis type 1 are relatively uncommon. Surgical decompression for intracranial optic gliomas frequently leads to clinical improvement, but obvious improvement of vision is rare. We report a case that demonstrated significant recovery of visual function after removal of the intracranial giant optic nerve glioma, revealing exophytic growth. CLINICAL PRESENTATION: A 13-year-old boy presented with visual impairment in both eyes. Magnetic resonance images (MRI) disclosed a 6 cm diameter mass in the suprasellar area. On heavily T2-reversed MRIs, it was obvious that the intracranial portion of right optic nerve was enlarged, and optic tracts were shifted to the left by the tumor. The relationship of the tumor to the chiasma could not be affirmed on MRIs. INTERVENTION: A right frontotemporal craniotomy for decompression of the optic apparatus was performed. After the majority of the tumor was resected, it became clear that the tumor originated in the right optic nerve. The tumor exophytically grew and dislocated the optic chiasma and optic tracts. Significant improvement of visual functions began from the first week after surgery and continued gradually thereafter. The histological diagnosis was pilocytic astrocytoma. A follow-up MRI taken 4 years after surgery showed no regrowth of the residual tumor. CONCLUSION: Giant exophytic gliomas without neurofibromatosis type 1 may arise from the intracranial portion of an isolated optic nerve. Direct visualization of optic component by heavily T2-reversed MRI could more precisely delineate the relationship of the intracranial optic nerve glioma to the optic apparatus. Surgery may be indicated in giant exophytic intracranial optic nerve gliomas and preoperative postulated optic chiasmatic gliomas. Microsurgical resection can induce postoperative visual improvement without regrowth of the residual tumor.

Cerebrovascular stereolithographic biomodeling for aneurysm surgery

2004 ◽  
Vol 100 (1) ◽  
pp. 139-145 ◽  
Author(s):  
Gabriele Wurm ◽  
Berndt Tomancok ◽  
Peter Pogady ◽  
Kurt Holl ◽  
Johannes Trenkler
Keyword(s):  
Surgical Simulation ◽  
Imaging Techniques ◽  
Cerebral Aneurysms ◽  
Imaging Data ◽  
Anatomical Structures ◽  
Content Type ◽  
Prospective Comparison ◽  
Relationship Of ◽  
The Relationship ◽  
Fine Print

✓ Stereolithographic (SL) biomodeling is a new technology that allows three-dimensional (3D) imaging data to be used in the manufacture of accurate solid plastic replicas of anatomical structures. The authors describe their experience with a patient series in which this relatively new visualization method was used in surgery for cerebral aneurysms. Using the rapid prototyping technology of stereolithography, 13 solid anatomical biomodels of cerebral aneurysms with parent and surrounding vessels were manufactured based on 3D computerized tomography scans (three cases) or 3D rotational angiography (10 cases). The biomodels were used for diagnosis, operative planning, surgical simulation, instruction for less experienced neurosurgeons, and patient education. The correspondence between the biomodel and the intraoperative findings was verified in every case by comparison with the intraoperative video. The utility of the biomodels was judged by three experienced and two less experienced neurosurgeons specializing in microsurgery. A prospective comparison of SL biomodels with intraoperative findings proved that the biomodels replicated the anatomical structures precisely. Even the first models, which were rather rough, corresponded to the intraoperative findings. Advances in imaging resolution and postprocessing methods helped overcome the initial limitations of the image threshold. The major advantage of this technology is that the surgeon can closely study complex cerebrovascular anatomy from any perspective by using a haptic, “real reality” biomodel, which can be held, allowing simulation of intraoperative situations and anticipation of surgical challenges. One drawback of SL biomodeling is the time it takes for the model to be manufactured and delivered. Another is that the synthetic resin of the biomodel is too rigid to use in dissecting exercises. Further development and refinement of the method is necessary before the model can demonstrate a mural thrombus or calcification or the relationship of the aneurysm to nonvascular structures. This series of 3D SL biomodels demonstrates the feasibility and clinical utility of this new visualization medium for cerebrovascular surgery. This medium, which elicits the intuitive imagination of the surgeon, can be effectively added to conventional imaging techniques. Overcoming the present limitations posed by material properties, visualization of intramural particularities, and representation of the relationship of the lesion to parenchymal and skeletal structures are the focus in an ongoing trial.

The Relationship of Imaging Techniques to the Accuracy of Frameless Stereotaxy

1999 ◽  
Vol 72 (2-4) ◽  
pp. 136-141 ◽  
Author(s):  
Michael Schulder ◽  
Peter Fontana ◽  
Marvin A. Lavenhar ◽  
Peter W. Carmel
Keyword(s):  
Imaging Techniques ◽  
Frameless Stereotaxy ◽  
Relationship Of ◽  
The Relationship

scholarly journals Intraoperative use of diffusion tensor imaging fiber tractography and subcortical mapping for resection of gliomas: technical considerations

2010 ◽  
Vol 28 (2) ◽  
pp. E6 ◽  
Author(s):  
Lorenzo Bello ◽  
Antonella Castellano ◽  
Enrica Fava ◽  
Giuseppe Casaceli ◽  
Marco Riva ◽  
...  
Keyword(s):  
Diffusion Tensor ◽  
Imaging Techniques ◽  
Fiber Tractography ◽  
Combined Use ◽  
Subcortical Mapping ◽  
Language Areas ◽  
Relationship Of ◽  
Tractography Data ◽  
The Relationship ◽  
Technical Considerations

Resection of lesions involving motor or language areas or pathways requires the intraoperative identification of functional cortical and subcortical sites for effectively and safe guidance. Diffusion tensor (DT) imaging and fiber tractography are MR imaging techniques based on the concept of anisotropic water diffusion in myelinated fibers, which enable 3D reconstruction and visualization of white matter tracts and provide information about the relationship of these tracts to the tumor mass. The authors routinely used DT imaging fiber tractography to reconstruct various tracts involved in the motor and/or language system in a large series of patients with lesions involving the motor and/or language areas or pathways. The DT imaging fiber tractography data were loaded into the neuronavigational system and combined intraoperatively with those obtained from direct electrical stimulation applied at the subcortical level. In this paper the authors report the results of their experience, describing the findings for each tract and discussing technical aspects of the combined use as well as the pitfalls.

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