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January 27, 2005 Vol. 352 No. 4
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This randomized trial examined the effect of adding etanercept to standard therapy in order to maintain disease remissions in patients with Wegener's granulomatosis. Only 49 percent of patients remained in remission throughout the trial, and etanercept did not result in a higher rate of sustained remission than placebo.
Hypertrophic cardiomyopathy is usually caused by mutations in sarcomere proteins, but in some patients such mutations are not found. This study identified mutations in genes encoding enzymes involved in glycogen metabolism as causes of hypertrophic cardiomyopathy. Thus, glycogen storage diseases may sometimes present as hypertrophic cardiomyopathy, owing to accumulation of glycogen-filled vacuoles in myocytes.
A 47-year-old woman with a history of breast cancer presents with confusion and dehydration. The serum calcium level is 18.0 mg per deciliter. She has postural hypotension and low central venous pressure. The serum phosphorus level is 5.0 mg per deciliter, the blood urea nitrogen level 80 mg per deciliter, the serum creatinine level 2.0 mg per deciliter, and the albumin level 3.3 g per deciliter. Bone scintigraphy reveals no evidence of skeletal involvement by the tumor. How should she be treated?
The β-lactamases are the major bacterial defense of gram-negative bacteria against β-lactam antibiotics. This review details the many types of β-lactamases, explains how they can be detected, and summarizes information on the genetics of this form of resistance. The authors also suggest strategies for clinical management and prevention of this difficult type of antibiotic resistance.
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A 14-year-old boy was evaluated because of slow growth and delayed puberty. His growth chart showed that about four years earlier his rate of weight gain had slowed from approximately the 50th to the 25th percentile. He was otherwise asymptomatic. Hand radiographs showed a bone age of 12 years 6 months. A diagnostic procedure was performed.
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