Can you see silicone injections in the butt on an ultrasound guidance?

Yes. I use this technique frequently. Our office is the leading center for the removal of foreign body fillers in the United States. My approach is protocol based, beginning with an examination to determine the grade of inflammation using the Karamanoukian Grading Scale for Soft Tissue Inflammation. Silicone biopolymers and PMMA can be safely removed from the face and body. Longterm complications are minimized with diligent attention to detail and protocol-based treatment. 
Best, 
Dr. Karamanoukian
Realself100 Surgeon

Thanks for the question/s. Understanding illegal silicone butt injections is the first issue. These injections are disbursed through the sub dermal, sub cutaneous, fat, muscle in the buttock. Since the foreign substance has unknown responses to any manipulation (ie: removal, injection on top or into areas, etc) it is impossible to predict unforseen outcomes. I have taken care of many #s of these patients. From deforming removal of the injected areas, injection into areas of fat, and the results are unpredictable. I favor surgical sessions of lipo with limited fat transfer vs deformation of the gluteal anatomy. But infections, abscesses, draining sinuses do occur. Best is in person examination and a complete understanding of all the risks vs benefits.