Value of the new 5-sector approach for orbital imaging division in diagnosis of orbital space-occupying lesions

2008 ◽  
Vol 28 (3) ◽  
pp. 280-285
Author(s):  
Jian-hua YAO
Keyword(s):  
Orbital Space ◽  
Orbital Imaging

scholarly journals Computerized Tomography-Guided Core-Needle Biopsy of Orbital Space-Occupying Lesions: A Case Series

2020 ◽  
pp. 1-8
Author(s):  
Bashar M. Bata ◽  
Andrew Martin ◽  
Daniel Connolly ◽  
Hardeep Singh Mudhar ◽  
Naomi Hersey ◽  
...  
Keyword(s):  
Computerized Tomography ◽  
Neuroendocrine Tumour ◽  
Case Series ◽  
B Cell Lymphoma ◽  
Major Surgery ◽  
Open Biopsy ◽  
Core Needle ◽  
Peribulbar Block ◽  
Orbital Space ◽  
Mass Lesions

<b><i>Purpose:</i></b> To describe our experience in performing biopsy of post-septal orbital masses with core needle under computerized tomography guidance (CT-CNB). <b><i>Methods:</i></b> The medical records of all patients who underwent this procedure were reviewed. The procedure was performed under local anesthesia on a day case basis under a peribulbar block. A planning non-contrast computerized tomography (CT) scan of the orbits was performed to localise the mass. A 6-cm 18-G Temno Evolution® semi-automated biopsy needle was inserted through the skin into the orbit. Prior to further advancement of the needle, a low-dose CT limited to the previously determined plane was performed to confirm its position. The needle was then advanced, and the cutting needle was deployed to obtain the biopsy. <b><i>Results:</i></b> Five patients who underwent CT-CNB were identified. The CNB was successful in 4 patients and revealed a metastatic prostate adenocarcinoma, diffuse large B-cell lymphoma, a metastatic neuroendocrine tumour, and orbital inflammatory disease. The biopsy failed in the fifth patient when the needle failed to penetrate the tumour despite good localisation on CT. He was eventually diagnosed with fibrous meningioma of the greater wing of sphenoid on open biopsy. None of the patients had any complications other than peri-ocular bruising which was present in all of them. <b><i>Conclusion:</i></b> CT-CNB of mass lesions located in the lateral aspect of the orbit can be an alternative to open biopsy in selected cases. It avoids major surgery and allows the use of radiotherapy, if required, without any delay.

scholarly journals Multiorbital singlet pairing and d + d superconductivity

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Emilian M. Nica ◽  
Qimiao Si
Keyword(s):  
Time Reversal ◽  
Heavy Fermion ◽  
Degrees Of Freedom ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Matrix Structure ◽  
Spin Singlet ◽  
Low Energies ◽  
Triplet Pairing ◽  
Orbital Space

AbstractRecent experiments in multiband Fe-based and heavy-fermion superconductors have challenged the long-held dichotomy between simple s- and d-wave spin-singlet pairing states. Here, we advance several time-reversal-invariant irreducible pairings that go beyond the standard singlet functions through a matrix structure in the band/orbital space, and elucidate their naturalness in multiband systems. We consider the sτ3 multiorbital superconducting state for Fe-chalcogenide superconductors. This state, corresponding to a d + d intra- and inter-band pairing, is shown to contrast with the more familiar d + id state in a way analogous to how the B- triplet pairing phase of 3He superfluid differs from its A- phase counterpart. In addition, we construct an analog of the sτ3 pairing for the heavy-fermion superconductor CeCu2Si2, using degrees-of-freedom that incorporate spin-orbit coupling. Our results lead to the proposition that d-wave superconductors in correlated multiband systems will generically have a fully-gapped Fermi surface when they are examined at sufficiently low energies.

scholarly journals Primary Malignant Orbital Tumors

2021 ◽  
Vol 82 (01) ◽  
pp. 081-090
Author(s):  
Jacquelyn Laplant ◽  
Kimberly Cockerham
Keyword(s):  
Multimodal Therapy ◽  
Surgical Techniques ◽  
Surgical Approaches ◽  
Imaging Features ◽  
Orbital Surgery ◽  
Diagnosis And Management ◽  
Microsurgical Techniques ◽  
Invasive Techniques ◽  
Traditional Approaches ◽  
Orbital Imaging

Abstract Objective Primary orbital malignancy is rare. Awareness of the characteristic clinical and imaging features is imperative for timely identification and management. Surgery remains an important diagnostic and treatment modality for primary orbital malignancy, but determining the optimal surgical approach can be challenging. The purpose of this article is to explore recent advances in the diagnosis, management, and surgical approaches for primary orbital malignancies. Design In this review, the clinical presentation, imaging features, and medical and surgical management of primary orbital malignancies with representative cases will be discussed. Setting Outpatient and inpatient hospital settings. Participants Patients with diagnosed primary orbital malignancies. Main Outcome Measures Descriptive outcomes. Results Advancements in orbital imaging, microsurgical techniques, and multimodal therapy have improved the diagnosis and management of primary orbital malignancies. Special considerations for biopsy or resection are made based on the tumor's location, characteristics, nearby orbital structures, and goals of surgery. Minimally invasive techniques are supplanting traditional approaches to orbital surgery with less morbidity. Conclusions Advances in imaging technologies and surgical techniques have facilitated the diagnosis and management of primary orbital malignancies. Evolution toward less invasive orbital surgery with focus on preservation and restoration of function is underway.

Optimized virtual orbital space for high‐level correlated calculations

1987 ◽  
Vol 86 (11) ◽  
pp. 6314-6324 ◽  
Author(s):  
Ludwik Adamowicz ◽  
Rodney J. Bartlett
Keyword(s):  
Virtual Orbital ◽  
Orbital Space ◽  
High Level

scholarly journals Masses of the Lacrimal Gland: Evaluation and Treatment

2021 ◽  
Vol 82 (01) ◽  
pp. 100-106 ◽  
Author(s):  
Jane S. Kim ◽  
Jason Liss
Keyword(s):  
Lacrimal Gland ◽  
Malignant Disease ◽  
Systemic Disease ◽  
Granulomatous Inflammation ◽  
Disease Recurrence ◽  
Rapid Onset ◽  
Lymphoproliferative Disorders ◽  
Orbital Imaging ◽  
Malignant Neoplasia

AbstractLacrimal gland lesions account for approximately 9 to 10% of all biopsied orbital masses. Potential causes include nongranulomatous and granulomatous inflammation, autoimmune disease, lymphoproliferative disorders, benign epithelial proliferation, malignant neoplasia, and metastatic disease. Inflammatory lesions and lymphoproliferative disorders are the most common and may be unilateral or bilateral; they may also be localized to the orbit or associated with systemic disease. Both benign and malignant epithelial lacrimal gland masses tend to be unilateral and involve the orbital lobe, but a more rapid onset of symptoms and periorbital pain strongly suggest malignant disease. On orbital imaging, both inflammatory and lymphoproliferative lesions conform to the globe and surrounding structures, without changes in adjacent bone, whereas epithelial lacrimal gland masses often show scalloping of the lacrimal gland fossa. Malignant epithelial lacrimal gland tumors can also have radiographic evidence of bony invasion and destruction. Masses of the lacrimal gland may be due to a broad range of pathologies, and a good working knowledge of common clinical characteristics and radiographic imaging findings is essential for diagnosis and treatment. All patients with inflammatory, lymphoproliferative, and epithelial neoplastic lesions involving the lacrimal gland require long-term surveillance for disease recurrence and progression.

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