Nihon Kyōbu Shikkan Gakkai zasshi
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Nihon Kyobu Shikkan Gakkai Zasshi · Jan 1990
Case Reports[Two cases of spontaneous pneumomediastinum due to Xiao-lin Temple boxing vocal exercise].
Two cases of spontaneous pneumomediastinum and subcutaneous emphysema were reported. The first cases was a 21-year-old man who had a past history of recurrent spontaneous pneumothorax. The second was a healthy 20-year-old man. ⋯ The chest X-ray films revealed intramediastinal air and subcutaneous emphysema in both cases. We diagnosed these patients as spontaneous pneumomediastinum because of no underlying disease. This is a report of rare cases of spontaneous pneumomediastinum occurring at the same time, and one of the mechanism causing them was considered to be a sudden increase in intrathoracic pressure due to the vocal exercise of chinese boxing.