The epidemiology and treatment of radial head subluxation

The incidence and treatment of radial head subluxation were evaluated in emergency room and private office settings. Factors associated with recurrence and with successful reduction were identified, and ways to prevent this common injury were sought. Of 54 reductions during which a click was either felt or heard, all but one reduction resulted in reuse of the arm within 30 minutes. Of 13 reductions in which a click was neither felt nor heard, only four reductions resulted in reuse of the arm within 30 minutes. A supination maneuver resulted in reuse of the arm within 30 minutes in all 27 patients seen two or more hours after injury vs 85% (34/40) of patients seen less than two hours after injury. Remanipulation 12 to 106 hours later resulted in reuse of the arm in all those children who had failed to respond to previous treatment.

Older paternal age and fresh gene mutation: data on additional disorders

Older paternal age has previously been documented as a factor in sporadic fresh mutational cases of several autosomal dominant disorders. In this collaborative study, an older mean paternal age has been documented in sporadic cases of at least five additional dominantly inheritable disorders; the basal cell nevus syndrome, the Waardenburg syndrome, the Crouzon syndrome, the oculo-dental-digital sysdrome, and the Treacher-Collins syndrome. It was also found to be a factor in acrodysostosis and progeria, suggesting a fresh mutant gene etiology for these two conditions in which virtually all cases have been sporadic and the mode of genetic etiology has been unknown.

Formation of p-tyramine from DOPA and DOPamine in rat brain

Labelled p-tyramine was isolated and identified in rat brain 15 min after an intraventricular injection of DL-3(3,4-dihydroxyphenyl)alanine-2-14C. Chromatographic and mass spectrometric techniques indicated that the dehydroxylation occurred at the meta position.

Experimental alkaptonuria in the rat induced by tryptophan deficiency

An experimental alkaptonuria induced by tryptophan deficiency has been observed in the rat. The condition of alkaptonuria followed development of signs of tryptophan deficiency as judged by weight loss of the young, growing rat and its general appearance. Homogentisic acid was identified by a comparison of its behavior on thin-layer chromatography with authentic homogentisate and by means of the enzyme homogentisic acid oxidase. The condition was relieved by the return of tryptophan to the diet.