Imitating the Great Imitator The Intersection of Sarcoidosis and Hodgkin's Lymphoma A Report of Two Cases.

Sarcoidosis and Hodgkin's lymphoma represent two distinct diseases with different pathogenic mechanisms, therapeutic interventions, and prognoses. Nevertheless, both diseases can have overlapping presentations, thus blurring the line between successful identification and treatment. A propensity to develop one of these diseases following diagnosis of the other has long been appreciated. Here we review two cases of presumed sarcoidosis that were ultimately diagnosed as Hodgkin's lymphoma. Both patients initially presented with non-specific symptoms and underwent a thorough workup, including histological evaluation demonstrating non-caseating granulomas without evidence of malignancy. Both patients started sarcoid-directed therapies with relapse of symptoms. Repeat imaging and tissue biopsy eventually led to the diagnosis of stage IVB Hodgkin's lymphoma. After the initiation of Hodgkin's-directed therapies, both patients showed marked clinical responses, and entered complete remission.