When a soft tissue tumor is initially misdiagnosed as a simple trauma or a mass, treatment may be adversely affected by the delay in diagnosis or an inappropriate invasive procedure that results in extension of a probable malignant tumor. Patients with soft tissue tumors present a diagnostic challenge to the clinician. A systematic approach to the evaluation and biopsy is necessary in order to minimize diagnostic errors and biopsy complications. With a multidisciplinary approach and adequate surgical management, the prognosis with a five-year survival rate can be excellent.