Recurrent subcutaneous emphysema as a consequence of bulimia nervosa.

OBJECTIVE: Pneumomediastinum is a rare complication of increased intrathoracic pressure. It is more likely to occur in individuals with nutritional deficiencies. Pneumomediastinum has been reported in some individuals with anorexia nervosa. METHOD: Case report. RESULTS: Recurrent subcutaneous emphysema is probably secondary to recurrent pneumomediastinum in a woman with bulimia nervosa. DISCUSSION: It is believed that increased intrathoracic pressure and nutritional deficiency associated with repeated induced vomiting contributed to this complication. This is the only case of recurrent subcutaneous emphysema. While in this case, and in most cases, the course was benign with eventual reabsorption of the subcutaneous air, pneumomediastinum can be a life-threatening complication of bulimia nervosa.

Bimodal association of a bis-1,2,3-dithiazolyl radical.

The N-ethyl pyrazine-bridged bis-1,2,3-dithiazolyl radical (R(1) = Et) associates at room temperature as a C-C bonded sigma-dimer which, on heating, converts to a laterally S-S sigma-bonded structure.