Years ago I used to subscribe to Readers Digest and there was a true story about a divorced woman who had struggled with doctors for over a year, loosing her job due to time out of work, because her son had become short of breath. She kept telling the doctors she had seen him aspirate a nut - only she thought it was only the shell. They did tests, didn't find anything, tried all sorts of medicines and her son kept getting worse. She did research and kept begging for a bronchoscopy - which she eventually got but it was negative. She begged for a lavage or another scope and the doctors wouldn't do it because the insurance wouldn't pay for it. She kept telling them she knew what she had seen. Eventually a doctor did another scope and TaDa the nut had taken root in his lung.