Bone Leiomyosarcoma. Report of a Case

We present a 46-year-old male patient with a history of hypertension and cardiac arrhythmia who 9 months before going to the center began to present pain in the left knee that was relieved with analgesics, which is why he did not go to the doctor, but over time it began to intensify and present limitation of the mobility of the knee and impossibility for the support of the left lower limb because it failed.She went to the doctor, who indicated an X-ray, showing an extensive irregular lytic lesion and a diagnosis of Giant Cell Tumor (GCT); He was referred to our Department, where we performed imaging studies and a biopsy that reported primary leiomyosarcoma of the bone.The decision is made to perform supracondylar amputation.As it is an uncommon tumour that is difficult to treat, it is important to take advantage of the scientific and technical means that we have at our disposal that help us to reach a diagnosis of certainty.