Implantation iris cysts developing 24 years after penetrating keratoplasty.

Purpose: To report a case of iris implantation cysts occurring 24 years after penetrating keratoplasty and its management.

Observations: A 60-year-old man was referred for diagnosis and management of white iris masses of the right eye. He had undergone bilateral penetrating keratoplasty 24 years before without complication.

Discriminating between IgG4-related orbital disease and other causes of orbital inflammation with intra voxel incoherent motion (IVIM) MR imaging at 3T.

Purpose: The purpose of this prospective study was to determine the capabilities of intravoxel incoherent motion (IVIM) MRI at 3 Tesla in discriminating between IgG4-related orbital disease (IgG4-ROD) and other causes of orbital inflammation.

Materials And Methods: Main selection criteria for the patients enrolled in this prospective study were age over 18 years and histopathologicaly proven orbital inflammatory lesion. MRI examinations were performed prior to surgery and treatment in all patients with suspected orbital inflammation.

Diagnostic accuracy of Quantitative Colour Doppler Flow imaging in distinguishing Persistent Fetal Vasculature from Retinal Detachment.

Purpose: Distinguishing posterior persistent fetal vasculature (PFV) from retinal detachment (RD) may be very challenging clinically and ultrasonographically, as they share common morphological features. However, it is crucial, considering their substantially distinct management and treatment. We aimed to assess the relevance of quantitative colour Doppler flow imaging to distinguish PFV from RD in children.

Dixon-T2WI magnetic resonance imaging at 3 tesla outperforms conventional imaging for thyroid eye disease.

Objectives: To determine the diagnostic performances of a single Dixon-T2-weighted imaging (WI) sequence compared to a conventional protocol including T1-, T2-, and fat-suppressed T2-weighted MRI at 3 T when assessing thyroid eye disease (TED).

Materials And Methods: This IRB-approved prospective single-center study enrolled participants presenting with confirmed TED from April 2015 to October 2019. They underwent an MRI, including a conventional protocol and a Dixon-T2WI sequence.

Intravoxel incoherent motion (IVIM) 3 T MRI for orbital lesion characterization.

Objectives: To determine the diagnostic accuracy of MRI intravoxel incoherent motion (IVIM) when characterizing orbital lesions, which is challenging due to a wide range of locations and histologic types.

Methods: This IRB-approved prospective single-center study enrolled participants presenting with an orbital lesion undergoing a 3-T MRI prior to surgery from December 2015 to July 2019. An IVIM sequence with 15 b values ranging from 0 to 2000 s/mm was performed.

Quality-based pharmacokinetic model selection on DCE-MRI for characterizing orbital lesions.

Background: Although several studies have evaluated dynamic contrast-enhanced (DCE) MRI in the orbit, showing its utility when detecting and diagnosing orbital lesions, none have evaluated the pharmacokinetic models.

Purpose: To provide a quality-based pharmacokinetic model selection for characterizing orbital lesions using DCE-MRI at 3.0T.

Combining Multiple Magnetic Resonance Imaging Sequences Provides Independent Reproducible Radiomics Features.

To evaluate the relative contribution of different Magnetic Resonance Imaging (MRI) sequences for the extraction of radiomics features in a cohort of patients with lacrimal gland tumors. This prospective study was approved by the Institutional Review Board and signed informed consent was obtained from all participants. From December 2015 to April 2017, 37 patients with lacrimal gland lesions underwent MRI before surgery, including axial T1-WI, axial Diffusion-WI, coronal DIXON-T2-WI and coronal post-contrast DIXON-T1-WI.

Iris melanoma relapsing sixteen years after proton-beam therapy: The importance of lifelong follow-up.

Purpose: To report a case of locally recurrent spindle-cell iris amelanotic melanoma 16 years after proton-beam therapy.

Observations: In 2001, a 45-year-old man presented with an amelanotic iris melanoma, extending from the 5 to 10 o'clock positions on his left eye. High-frequency ultrasonography showed extension of melanoma into the ciliary body.

Small Choroidal Melanoma Revealed by a Large Extrascleral Extension.

Aims: Orbital extraocular extension of choroidal melanoma is very rare with small melanomas. We report the case of a patient whose small choroidal melanoma was initially overlooked and was revealed by a large extrascleral extension.

Methods: A 48-year-old Caucasian woman presented with sudden total visual loss in the right eye.

Repeatability of apparent diffusion coefficient and intravoxel incoherent motion parameters at 3.0 Tesla in orbital lesions.

Objectives: To evaluate repeatability of intravoxel incoherent motion (IVIM) diffusion-weighted imaging (DWI) parameters in the orbit.

Methods: From December 2015 to March 2016, 22 patients were scanned twice using an IVIM sequence with 15b values (0-2,000 s/mm) at 3.0T.

Detection of an Iris Pigmented Epithelium Cyst in a Child by High Frequency Ultrasonography.

An 18-month-old boy presented with an iris pigmented epithelium cyst. The diagnosis was confirmed using high frequency ultrasonography. The cyst was determined to be in an intermediate location, thus needing no treatment provided that any potential complications were noted.

[Orbito-palpebral vascular pathology].

Orbito-palpebral vascular pathology represents 10% of all the diseases of this area. The lesion may be discovered during a brain CT scan or MRI, or because it causes clinical symptoms such as orbital mass, visual or oculomotor alteration, pain, proptosis, or acute bleeding due to a complication of the lesion (hemorrhage, thrombosis). We present these lesions using an anatomical, clinical, imaging and therapeutic approach.

Salivary gland-sparing helical tomotherapy for head and neck cancer: Preserved salivary function on quantitative salivary gland scintigraphy after tomotherapy.

Goals: Prospective evaluation of salivary gland preservation, overall survival and local recurrence-free survival after head and neck cancer treated by helical tomotherapy (HT).

Material And Methods: From March 2007 to February 2009, 30 patients with head and neck cancer were treated by HT. The salivary excretion fraction (SEF) was assessed by technetium salivary gland scintigraphy before, and 6, 12 and 18 months after HT to define salivary gland preservation rates.

[Aneurysmal bone cyst: A rare cause of orbital disease].

Aneurysmal bone cyst is a rare benign bone neoplasm of unknown cause. The most commonly affected anatomical sites are the vertebral column and long bones. We report two uncommon cases of primary orbital aneurysmal bone cyst presenting as an acute orbital compartment syndrome due to subperiosteal hemorrhage.

Usefulness of colour Doppler flow imaging in the management of lacrimal gland lesions.

Objective: To assess the role of colour Doppler flow imaging (CDFI) in the diagnosis and management of lacrimal fossa lesions.

Methods: Institutional ethical committee approval was obtained. Fifty-one patients with 62 lacrimal fossa lesions were retrospectively included from 2003-2015.

Open-angle glaucoma and paraoptic cyst: first description of a series of 11 patients.

We report 11 patients who were referred to our institution for severe open-angle glaucoma who had a paraoptic cyst on MR imaging. All cysts were extraoptic and retrolaminar; most were deforming the adjacent optic nerve. Cysts had a high signal on T2 and FLAIR sequences, and a variable signal on T1 and variable echogenicity, suggesting different proteinaceous content.

Tumor pathology of the orbit.

The term orbital tumor covers a wide range of benign and malignant diseases affecting specific component of the orbit or developing in contact with them. They are found incidentally or may be investigated as part of the assessment of a systemic disorder or because of orbital signs (exophthalmos, pain, etc.).

[Tolerance and efficacy of preoperative radiation therapy for elderly patients treated for rectal cancer].

Purpose: To retrospectively assess the impact of age on tolerance and oncologic outcomes treated by neoadjuvant treatment for patients of 70 years old or above with locally advanced rectal cancer.

Patients And Methods: Ninety-one consecutive patients were divided into three groups: group 1 from 70 to 75 years (n=31); group 2: 76 to 79 years (n=31) and group 3, patients aged 80 years or above (n=29). Radiation therapy was delivered according two schemes: 25Gy in five fractions (short scheme) or 45 to 50Gy with a classical fractionation (long scheme).

A wander through the land of the orbit.

This article shows the pathological and physiological images of the orbit, which each radiologist will commonly see in his or her everyday CT scan practice. It explains the images, following the course of the patient's trajectory through imaging as complications develop or in the post-treatment monitoring of some common disorders (orbital trauma, retinal detachment, postoperative appearances).

TetraMag: a compact magnetizing device based on eight rotating permanent magnets.

In this paper we describe a novel magnetizing device based on eight rotatable permanent magnets arranged in a quadrupolar configuration, which is termed the TetraMag. TetraMag creates stable and homogeneous magnetic fields at the sample position with a resolution of 0.02 mT tunable between -570 mT and +570 mT.

[Discriminant analysis of patients with primary open-angle glaucoma by color Doppler exam and visual field].

Purpose: To determine if variables from color Doppler and visual field exam could discriminate normal from glaucomatous eyes.

Methods: Prospectively, 36 patients with primary open-angle glaucoma (glaucoma group) and 20 normal volunteers (control group) were studied. Gender, age, central corneal thickness, intraocular pressure, Octopus automated perimetry global indices (mean defect and loss variance) and several parameters of the color Doppler (peak systolic velocity and resistivity index) were compared between groups.