Mycetoma is a variety of deep mycoses. The endemic centres are situated in the countries with tropic or subtropic climate. In diagnosis, the important place belongs to microbiological, histological and roentgenological investigations. Surgical treatment supposes the radical removal of a pathological focus in aiming at preservation of the weight-bearing surface of an extremity. In intact skin, the subcutaneous incision of the mycous infiltrate is performed. The extensive soft tissue defects, especially at the region of joints, require primary or secondary autodermoplasty. The medicamentous treatment of fungal mycetomas is ineffective. The positive effect of Ketocanazole (Nizoral) before the operation was noted.