Unexpected Metastatic Recurrent Myxofibrosarcoma: A Scenario That May Be More Common than You Think

Abstract

Soft tissue sarcomas represent only 1% of all adult cancers; myxofibrosarco ma is the most common type that arises in adult extremities, particularly lower limbs (77%), other less common locations are the trunk (12%) and neck (3%). Usually presenting as a painless, subcutaneous, slow growing mass with tendenc y for recurrence, they are prone to have higher histological grade an d metastatic potential after recurrence; even in optimal multidisciplinary setti ngs patients can have incomplete resections, making metastatic dise ase more co mmon after misdiagnosis. We present the case of a 69-year-old male patient with a right infraescapular tumor, presenting as a painless 15 × 8 cm, mobile mass, with a slow but progressive growth, history of a previous tumor excised at the same location 5 years prior without histopathological report.