Subglottic stenosis carries devastating consequences. Its pathogenesis, and therefore prevention, have thus far eluded precise definition. The following data suggest that tracheostomy results in a contaminated wound, secondarily infecting a larynx which may have been injured by prior intubation, fracture, or surgery. The interpretation of these data is based upon the tested assumption that infection prolongs healing of injured tissue and predisposes to scar and stricture formation. Therefore, the ability of control stomal contamination by the judicious use of topical or systemic antibiotics may play an important role in the prevention of complications in an organ functionally by-passed by the tracheostomy cannula.

The CMS detector at the CERN LHC features a silicon pixel detector as its innermost subdetector. The original CMS pixel detector has been replaced with an upgraded pixel system (CMS Phase-1 pixel detector) in the extended year-end technical stop of the LHC in 2016/2017. The upgraded CMS pixel detector is designed to cope with the higher instantaneous luminosities that have been achieved by the LHC after the upgrades to the accelerator during the first long shutdown in 2013–2014. Compared to the original pixel detector, the upgraded detector has a better tracking performance and lower mass with four barrel layers and three endcap disks on each side to provide hit coverage up to an absolute value of pseudorapidity of 2.5. This paper describes the design and construction of the CMS Phase-1 pixel detector as well as its performance from commissioning to early operation in collision data-taking.

Echinococcal infestation, although still a rare occurrence in most of the United States, is being seen with increasing frequency. Three cases of hepatic echinococcosis are described. A review of the salient features of the disease is presented along with various aspects of diagnosis and therapy.

The use of prophylactic antibiotics by plastic surgeons is increasing, especially in aesthetic procedures. A review of the literature indicates that this increase in use is not based on scientific evidence of increased incidence of infection or on increased evidence of efficacy. The necessary data to provide scientific guidelines for antibiotic usage in plastic surgery do not exist. (Aesthetic Surg J 2003;23:177-183.).

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