An 82-year-old man with severe cardiac arrhythmia and recurrent heart failure presented with a 3-year history of erythematous plaques on the left orbita and on the chest. The lesion on his left eye was a hypertrophic actinic keratosis (231.5 cm), a scaly erythematous plaque on the saddle of the nose extending to the opening of the left lacrimal duct. The chest lesion consisted of a 532.5-cm pla...

Melanoma of the eye is rare, but can mimic a range of disorders. This report highlights 2 cases of choroidal melanoma with vision loss mimicking neurological diagnoses. The first patient is a 41-year-old white male with a known history of multiple sclerosis and a previous episode of optic neuritis in the right eye, who presented with a 6-month history of decreased vision in the same eye, and oc...

Introduction Pterygium is a wing-shaped, vascular, fleshy growth that originates from the conjunctiva and can spread into the corneal limbus and beyond. Beta irradiation after bare sclera surgery of primary pterygium is a simple, effective, and safe treatment, which reduces the risk of local recurrence. Materials and Methods Dosimetric components of strontium-90 (90Sr), phosphorous-32 (32P), an...

OBJECTIVE This study was conducted to compare the relative, clinical intraocular dose distribution for palladium-103 (103Pd) versus iodine-125 (125I) ophthalmic plaque radiation therapy. METHODS Preoperative comparative radiation dosimetry was performed to evaluate 319 consecutive uveal melanomas treated between 2006 and 2012. RESULTS There were 68 (21.3 %) anterior (iris and/or ciliary bod...

Iodine-based liquid radiographic contrast agents were placed in normal and tumor-bearing (Greene strain) rabbit eyes to evaluate their ability to block iodine-125 radiation. This experiment required the procedures of tumor implantation, vitrectomy, air-fluid exchange, and 125I plaque and thermoluminescent dosimetry (TLD) chip implantation. The authors quantified the amount of radiation attenuat...

Palisaded neutrophilic granulomatous dermatitis (PNGD) is a rare entity that has been clearly defined neither clinically nor histopathologically. PNGD has been associated with some immune-mediated disorders such as rheumatoid arthritis, systemic lupus erythematosus, systemic vasculitis, Behçet's disease, as well as with lymphoproliferative conditions, bacterial endocarditis, sarcoidosis, and va...

Ruthenium-103 is the parent isotope of 103mRh (t1/2 56.1 min), an isotope of interest for Auger electron therapy. During the proton irradiation of thorium targets, large amounts of 103Ru are generated through proton induced fission. The development of a two part chemical separation process to isolate 103Ru in high yield and purity from a proton irradiated thorium matrix on an analytical scale i...

The results of the measurements of ionization due to the beta and gamma-radiations near the ground surface from 1967 through 1969 are reported, and are discussed comparing with those obtained from 1963 through 1966. The ionization due to the beta-radiation decreased gradu ally, and the mean value for this period is about I J at one meter above the ground surface, and that by the gamma-radiation...