[Tumor-like organ manifestations of actinomycosis]

This report describes a 36-year-old male suffering from a disease which began with subcutaneous nodules and tumors that opened to form fistulae for past 5 years. These lesions, localized in various areas, were combined with tumorlike symptoms of brain, lungs and liver. The histologic examination of one subcutaneous nodule led to the diagnosis of actinomycosis. The differential diagnosis of various forms of actinomycosis are discussed.