Extrinsic allergic alveolitis due to exposure to esparto dust.

We here describe the case of a patient with a history of exposure to esparto grass for two and a half years, who presented with clinical symptoms, radiological signs, pulmonary function test and histological findings consistent with the diagnosis of hypersensitivity pneumonitis. Signs and symptoms reappeared after re-exposure. There are few reports of stipatosis in the world literature.