[Digital necrosis revealing lung cancer: Case-report and review of the literature]. / Nécroses des orteils révélant un cancer bronchique : cas clinique et revue de la littérature.

We report the case of a 51-year-old patient who presented necrosis affecting all of the toes in a context of confusion and declining general health. The etiology work-up disclosed a lung mass. Biopsy and search for extension led to the diagnosis of adenocarcinoma with liver metastasis. Unfortunately, symptomatic treatment of the digital necrosis did not lead to improvement and the patient was given palliative care. Digital necrosis generally affects the fingers. Localization on the toes is atypical and few cases have been reported in the literature.

Selective real-time measurement of styrene vapor using a surface-acoustic-wave sensor with a regenerable organoplatinum coating.

The performance of a coated surface-acoustic-wave (SAW) sensor for monitoring styrene vapor is investigated. The effects of several organic co-contaminants and atmospheric humidity are described, and regeneration of the sensor coating is demonstrated. The dual-SAW delay-line oscillator employs a reagent coating of trans-PtCl2(ethylene)(pyridine) to trap styrene via ethylene substitution. The rate of change of the sensor frequency is used to provide real-time measurement of styrene vapor concentrations. No effect on the response to styrene is observed upon simultaneous exposure to each of several olefin and non-olefin solvent vapors used with styrene in industrial processes. Butadiene, however, presents a reversible negative interference by successfully competing with styrene for reaction with the trapping agent. The response to styrene exhibits a moderate positive humidity dependence. Following prolonged exposure, the original complex can be regenerated in situ by exposure to ethylene gas, permitting repeated use of the sensor. An emphasis is placed on the application of the sensor to workplace air monitoring.