Dramatic Response of a PD-L1–Positive Advanced Angiosarcoma of the Scalp to Pembrolizumab <?xml version="1.0" encoding="UTF-8"?> Rainer Hamacher, Dietrich Kämpfe, Kirsten Reuter-Jessen, Christoph ...

Angiosarcoma of the gastrointestinal tract is an exceedingly rare and aggressive vascular tumour that arises from the endothelial cells lining blood vessels. Although primary angiosarcoma in this ...