Supplementary Material for: Excision and reconstruction of atypical chest dermatofibrosarcoma protuberans tumor: A case report and literature review

Dermatofibrosarcoma protuberans (DFSP) originated as keloid sarcoma, gaining its current designation in 1925. DFSP exhibits slow growth, categorizing it as a low to intermediate-grade malignant sarcoma. Initially presenting as a small, firm, irregular skin nodule, it undergoes sudden, rapid growth, forming a prominent mass. While locally aggressive, distant metastasis is rare. DFSP affects mainly the torso then proximal extremities. In this case study, we described a 57-year-old male individual who received a diagnosis of DFSP, an uncommon and locally aggressive tumor affecting soft tissues. The primary histological diagnosis relies on immunohistochemical stains, enabling the distinction between DFSP and other fibrous tumors. Diagnosing DFSP is challenging due to its similarity to other skin lesions. A multidisciplinary approach is vital for accurate diagnosis and management.