Interstitial Granulomatous Dermatitis in a Patient with Prostate Cancer.

Interstitial granulomatous dermatitis (IGD) is a rare dermatosis, histologically characterized by an interstitial granulomatous infiltrate. It is associated with inflammatory arthritis, various medications, and autoimmune conditions. It is also associated with malignancies such as breast, endometrial, lung, and esophageal cancers as well as hematologic malignancies such as lymphoma and myelodysplastic syndrome. Herein we describe a case of IGD associated with prostate cancer, which has not been reported in the literature.