Regards to one knee lump. Clarify.

Hello doctor, It's for my mom. She has this one right leg pain and year ago. After that we showed to quite few orthopedic doctors, did xray and started medicines as well. She did physiotherapy as well after which her swelling increased in that area. So we stopped it Now she dint observe, but I saw that there was small hard lump like thing in her right leg. Next to knee side. Not on knee, but on leg only. We showed to orthopedic and they told to do MRI right knee joint for her which we did and report shows that. Will post few lines of the report here. (an oval encapsulated soft tissue lesion is seen in lower thigh. it measures 45×31×32mmm. Limited ultrasound revealed hypo intense soft tissue lesion with internal vascularity. Surrounding subcutaneous fat stranding is seen. It likely represents soft tissue neoplasm. Tissue sampling correlation is suggested) Can someone say what needs to be done next step. Some say remove it, some say don't. My mom is already scarred if a Kindly clarify.