Papillary endothelial hyperplasia is a peculiar benign intravascular process that bears a remarkable resemblance to a hemangiosarcoma. In 44 cases of this lesion studied from the files of the Armed Forces Institute of Pathology, the process manifested as a small tumor-like lesion that occurred most frequently in the subcutis of the fingers (14 cases), the head and neck region (ten), and the trunk (seven). Features that aided in recognition and differential diagnosis from a hemangiosarcoma included the intraluminal location of the lesion, the absence of tissue necrosis, and the intimate association of the proliferated tuft-like structures with thrombotic material.
展开▼
