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.

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.

[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.

Vitreoretinal dysplasia masquerading as Peters' anomaly.

Purpose: Vitreoretinal dysplasia is characterized by a congenital bilateral nonattachment of the retina. In some cases, anteroposition of the iris and lens can lead to corneolenticular contact and corneal opacity, masquerading as Peters' anomaly. We report 3 cases of vitreoretinal dysplasia initially diagnosed as Peters' anomaly.

Orbital cyst associated with ocular pit in an adult without microphthalmos.

We describe an adult without microphthalmos who developed an acquired compressive optic neuropathy secondary to an orbital cyst which showed direct communication with an optic disc pit. Such pits may be revealed by late complications such as orbital compressive cyst of the optic nerve, even in previously normal adult patients.

Orbital color Doppler imaging in embolic central retinal artery obliteration associated with neovascular glaucoma.

Purpose: To describe the detection of an embolism in the retrobulbar circulation using orbital color Doppler imaging (OCDI) in a patient with an inaccessible fundus because of neovascular glaucoma.

Methods: Review of the clinical, laboratory, photographic, and orbital color Doppler imaging records of a patient with central retinal artery occlusion (CRAO) associated with neovascular glaucoma.

Results: A 42-year-old man had no light perception in the left eye secondary to neovascular glaucoma.

Quantitative echography in the follow-up of patients treated with proton-beam irradiation for primary choroidal melanomas.

Quantitative ultrasonic characterization yields information that is correlated to the tissue microstructure and increases the diagnostic potential of ultrasound. The measurement of acoustic properties of melanomas in vivo has not yet been reported after proton-beam irradiation. This prospective study was conducted on a cohort of 50 patients diagnosed with primary malignant melanoma to assess in vivo the ability of quantitative echography to detect changes in choroidal malignant melanomas after proton-beam irradiation and to follow the ultrasonographic changes during 24 months posttreatment.

Color Doppler imaging of orbital vessels: personal experience and literature review.

Many Doppler imaging studies have been performed in recent years in a large number of ocular disorders because of improvements in the Doppler equipment used for detecting and measuring the low blood-flow velocities that are a requisite for the quantitative evaluation of blood flow in the orbital vessels. The ophthalmic artery, central retinal artery and vein, posterior ciliary arteries, and the superior ophthalmic vein can be easily identified using color Doppler sonography. The changes in local blood flow in these vessels assessed by spectral analysis pulsed Doppler sonography have been used to characterize and to obtain new insights into different nontumoral vascular disorders including carotid artery stenosis, central retinal vein occlusion, giant cell arteritis, glaucoma, diabetes, fistulas, and tumoral processes of the eye and orbit.