Undifferentiated Pleomorphic Sarcoma of a Chronic Burn Scar of the Knee With Lymph Node Metastasis

Malignant transformation of chronic burn scars are usually toward cutaneous lineages, including squamous cell carcinoma, basal cell carcinoma, and malignant melanoma. Sarcomas are less common. Undifferentiated pleomorphic sarcoma(UPS) is a subtype of soft tissue sarcoma with storiform-pleomorphic cells of uncertain origin, and has sparingly been reported to arise from burn scars. The majority are localized lesions probably due to the spatial distance of mesenchymal cells from the epithelium. The authors describe a rare case of UPS of the chronic burn scar of his knee with ipsilateral femoral and external iliac lymph node metastasis.

Undifferentiated pleomorphic sarcoma of the chest wall: a rare diagnosis

A 31-year-old man with no predisposing factors and no history of chronic disease presented with a small painless lump over his anterior chest wall. On evaluation, it was found to be undifferentiated pleomorphic sarcoma. He underwent wide local excision of the tumour with clear margins, followed by adjuvant radiotherapy. At 6-month follow-up, the patient is clinically and radiologically disease free.