Hansen's disease in a patient with a history of sarcoidosis.

We report a rare case of concomitant Hansen's disease (HD) and sarcoidosis. Reticulin staining may be a helpful diagnostic tool in establishing the diagnosis of sarcoidosis in skin lesions. The diagnosis of HD can be established despite negative polymerase chain reaction results for the detection of Mycobacterium leprae DNA. Finally, a well-established diagnosis of sarcoidosis does not preclude the development of another granulomatous disorder. Hence, when new lesions developed in a patient with sarcoidosis despite appropriate therapy, other concurrent diagnoses should be pursued.