Reconstruction with Supraclavicular Artery Island Flap for an Undifferentiated Pleomorphic Sarcoma of the Head and Neck: A Case Report

U ndifferentiated pleomorphic sarcoma (UPS), former- ly known as malignant fibrous histiocytoma (MFH), is one of the most common high-grade soft tissue sarcomas in adults.Following the classification revisions by the World Health Organization in 2002 and 2013, the term MFH was abandoned, and these tumors have since been referred to as "undifferentiated pleomorphic sarcoma".[1] While UPS predominantly arises in the lower extremities and retroperitoneal regions, its localization in the head and neck is quite rare, accounting for only 3-10% of all UPS cases.[2] Within the head and neck region, the neck, nasal cavity, and parotid gland are the most commonly reported sites.[3]