Sarcomas are rare tumors divided into two categories: soft tissue sarcomas and bone sarcomas. A soft tissue mass measuring more than 5 cm, deep, growing, atypical or symptomatic should be investigated further and referred to a specialized center. A percutaneous image-guided biopsy should always be performed in suspicious cases. Standard treatment is surgical. Radiotherapy and chemotherapy should be discussed in a multidisciplinary meeting. Recurrence is frequent and close follow-up of patients over the long term is necessary. A high degree of suspicion is required for any atypical abdominal lesion and the patient should be referred to a specialized sarcoma center as soon as possible instead of performing a surgical biopsy.