Whipple's disease of the lung.

Described here is a unique case of Whipple's disease in a 54 year old man with chronic severe cough and gastrointestinal symptoms in whom the initial diagnosis of Whipple's disease was made by lung biopsy. This is, to our knowledge, the first reported case in which the bacilliform structures of Whipple's disease have been demonstrated in tissues from other than the gastrointestinal tract of lymph nodes. Subsequently, a peroral biopsy of the small intestine was performed and revealed identical and pathognomonic features of Whipple's disease. The pulmonary roentgenologic findings are described and the histologic differential diagnosis of histiocytic infiltrates in the lung, which may be histologically similar to Whipple's disease, are briefly reviewed.