Cholangiocarcinoma in a 17-year-old boy with primary sclerosing cholangitis and UroVysion™ fluorescent in situ hybridization.

Primary sclerosing cholangitis (PSC) is uncommon in the younger age range and bile duct brushing cytology can present unique challenges. We describe the case of a 17-year-old boy with a new diagnosis of PSC who presented with cholangiocarcinoma. The clinical history, endoscopic features, cytomorphologic findings, and results of UroVysion™ fluorescent in situ hybridization (FISH) on the bile duct brush are described.

FL-41 tint improves blink frequency, light sensitivity, and functional limitations in patients with benign essential blepharospasm.

Objective: The objective of these 2 studies was to assess the efficacy of FL-41-tinted lenses in the treatment of benign essential blepharospasm (BEB).

Design: A randomized crossover study and a randomized crossover case-control study.

Participants: The first study included 30 subjects with BEB.

Efficient immobilization of a cadmium chemosensor in a thin film: generation of a cadmium sensor prototype.

[reaction: see text] The development of an ion-selective chemosensor for Cd(2+) allows generation of a "real-time" sensor. Immobilization of the chemosensor on quartz was achieved in a simple monolayer and in a thin film using a polymer intermediary. As intended, the thin film contains much more chemosensor than the monolayer and provides measurable responses to aqueous Cd(2+) concentrations below 1 microM.