A Violaceous Mass of the Chest: An Unsuspected Diagnosis of Primary Ewing Sarcoma

Ewing Sarcoma is the second most common primary bone cancer. To date, only a few cases of primary cutaneous Ewing Sarcoma have been published. We present a unique case of primary cutaneous Ewing Sarcoma, which presented as a blue to violaceous mass on a young woman’s chest. The lesion clinically did not align with previous reports of primary cutaneous Ewing Sarcoma but pathology and immunohistochemical stains confirmed the diagnosis. Because primary cutaneous Ewing Sarcoma may masquerade as benign tumors, dermatologists must be suspicious of otherwise benign looking tumors.