Abstract
Ultrasonography carried out in place of X-ray fistulography was able to clarify the location and shape of hip fistulas in a 23-year-old maleʼs chronic perianal pyoderma and a 24-year old maleʼs pilonidal sinus. Because the ultrasound examination technique is completely safe and is not invasive compared to the radiographic examination, the technique is recommended for searchs for fistulas as well as for subcutaneous tumors.