Simultaneous multiple intracerebral hemorrhage (SMICH) is defined as ICH in two or more discrete noncontiguous acute intraparenchymal locations on initial CT. About 5% of ICH patients present with SMICH. ICH/SMICH etiology is classically divided into disorders of primary or secondary origin. About half of primary SMICH cases are caused by cerebral amyloid angiopathy or hypertensive arteriopathy. In this review, we will discuss the radiological features associated with the different causes of primary and secondary ICH and SMICH. Due to its rarity and the associated high morbidity and mortality, we will focus in particular on SMICH.

中文翻译：

---

单一和同时发生的多发性脑出血：放射学回顾。

同时多发性脑出血 (SMICH) 定义为初始 CT 上两个或多个离散的非连续急性脑实质内位置的 ICH。大约 5% 的 ICH 患者表现为 SMICH。ICH/SMICH 病因学通常分为原发性或继发性疾病。大约一半的原发性 SMICH 病例是由脑淀粉样血管病或高血压性动脉病引起的。在这篇综述中，我们将讨论与原发性和继发性 ICH 和 SMICH 的不同病因相关的放射学特征。由于它的罕见性和相关的高发病率和死亡率，我们将特别关注 SMICH。