A teenager with a suspected mass in the gluteal region was taken to the emergency department of the Children's City Clinical Hospital and urgently sent for an ultrasound scan. Visually, the buttocks look normal. At palpation in the area of complaints (the medial surface of the gluteal region) tissue has a diffusely increased density, crunches like wet snow. According to the patient, there were no injections and acne in this area before, this mass was found a few days ago. On ultrasound, a diffuse increase in the echogenicity of the subcutaneous fat, presumably edema / panniculitis, is visualized. Image legend: O - oedema, N - normal adipose tissue in symmetrical gluteal region. | 
