52 year old female with a bulging neck mass she noticed over the past 4 months.
Epithelioid angiosarcoma is an aggressive malignancy which is important to recognize because it easily mimics multiple other epithelioid malignancies. Note that pankeratin staining is a feature in a significant minority of such cases and should not argue against the diagnosis.(Fletcher).
Fletcher CDM, Unni KK, Mertens FM. Pathology and Genetics of Tumours of Soft Tissue and Bones. Lyon, France: IARC Press; 2002:175–177. World Health Organization Classification of Tumours; vol 5.
Vascular : Angiosarcoma