Sarcomas are soft tissue tumors with variable malignant potential. Tumors are classified as benign, intermediate (locally invasive and tend to recur) or malignant (locally aggressive with potential for metastases). Their development is related to genetic factors, trauma, radiation, immunosuppression, carcinogens, and/or viruses. Histological grading, although subjective, plays an important role in classification and management. Aggressive sarcomas are usually poorly differentiated and tend to metastasize early. Nodal involvement is unusual but its presence constitutes a poor prognostic sign. It has also been recognized that biopsies, drains and sutures, along with postoperative fluid collection, are risk factors for tumor implantation and recurrence.
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