Multiple painful ulcerative-necrotic lesions in the lower extremities

Patient K., 44 years old, has been ill since November 2018, when for the first time, for no apparent reason, noted the appearance of a painful pustule in the anterior surface of the left leg. After spontaneous opening of the element, an ulcer was formed, characterized by rapid growth (in 14 days up to 8-9 cm in diameter). I turned to a dermatologist, after consultation, treatment was carried out (prednisolone 30 mg per day, antibacterial drugs, vascular therapy, non-steroidal anti-inflammatory drugs) with a positive effect in the form of a gradual, complete scarring of the ulcer.