Fig. 1

Examples of patients who had potential interstitial lung abnormalities on chest X-rays that were made prior to the start of symptoms. A patient who presented with temporary dyspnoea after a wasp sting 58 months prior to developing a cough and exertional dyspnoea. The chest X-ray at the time showed minimal reticular changes in the left lower lung. The chest X-ray that was made 20 months after symptoms started shows bilateral reticular changes in the lower fields, especially on the left. B patient who was evaluated for an episode of chest pain 30 months prior to developing a cough. The chest X-ray at the time showed bilateral reticular abnormalities. The chest X-ray that was made 2 months after symptoms started showed progressive reticular changes mainly in the lower fields