The signs of Tornwaldt's disease, such as postnasal discharge, increase of mucous secretion, dysfunction of the eustachian tube, sometimes associated with middle-ear infection, are now rarely seen in comparison to the 19th century. In this article, we report about a sign of Tornwaldt's disease which had not been described up to now: A troublesome expiratory whistle. The resection of the bursal wall eliminated this sign. The short-term whistle as the only sign of Tornwaldt's disease, without histological signs of inflammation, underlines Tornwaldt's idea that inflammation is a secondary reaction of nasopharyngeal cysts.