Leu H J
Zentralbl Allg Pathol. 1981;125(2):139-48.
Hemangiopericytoma (HP) is extremely rare in our country. During the last 30 years only two cases were found in the material of our institute. The first case was a tumor of the neck. In spite of little histological evidence of malignancy, local recurrence together with bone metastases occurred four years after removal of the primary tumor. The second case might be a transition of a HP into a hemangioendothelioma. The primary tumor at the lower arm showed the histological pattern of a HP but contained some capillaries with suspicious endothelial proliferations. A nodule in the axilla revealed the pattern of hemangioendothelioma with some areas which resembled a HP. The visceral metastases contained tumor tissue with the typical appearance of hemangioendothelioma. Evaluation of dignity of hemangiopericytomas is extremely difficult. Differentiation of malignant cases of HP from other richly vascularized soft tissue sarcomas and especially from stromal sarcoma of uterus may present problems.
血管外皮细胞瘤（HP）在我国极为罕见。在过去30年里，我们研究所的资料中仅发现两例。第一例是颈部肿瘤。尽管组织学上几乎没有恶性证据，但在原发肿瘤切除四年后出现了局部复发并伴有骨转移。第二例可能是HP转变为血管内皮瘤。前臂的原发肿瘤呈现HP的组织学模式，但包含一些有可疑内皮细胞增殖的毛细血管。腋窝的一个结节显示出血管内皮瘤的模式，其中一些区域类似HP。内脏转移灶含有具有血管内皮瘤典型外观的肿瘤组织。评估血管外皮细胞瘤的良恶性极为困难。将HP的恶性病例与其他血管丰富的软组织肉瘤，尤其是子宫间质肉瘤区分开来可能存在问题。
