Introduction: Cerebral microhaemorrhages, also referred to as cerebral microbleeds are a common finding on routine MRI brain examinations and there are a wide range of differential diagnoses associated with them. They are defined as small hypointense foci of upto 1 cm detected on gradient echo (GRE) or susceptibility weighted imaging (SWI)[1]. The two most common causes of microbleeds include systemic hypertension and cerebral amyloid angiopathy each with a distinctive distribution pattern. However, there are several uncommon causes which should be considered when cerebral microbleeds are identified on MRI imaging. These include diffuse axonal injury secondary to trauma, multiple cavernous malformations, posterior reversible encephalopathy, fat embolism, previous ECMO treatment and cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL). The pattern of microhaemorrhages can assist in differentiating between different pathologies. For example, the location of haemorrhage within the deep grey nuclei and infratentorial compartment are likely to reflect hypertensive pathology whereas lobar peripheral microhaemorrhages are more in keeping with cerebral amyloid angiopathy. There is also a potential association with microhaemmorhagic foci in COVID-19 patients [2]. 
 
 Methods and Results: A series of cases will be reviewed in this educational exhibit highlighting the imaging patterns of microhaemorrhages. Some of the common and uncommon causes of cerebral microhaemorrhages will be discussed with example cases. There will be particular focus on the various radiological manifestations of cerebral amyloid angiopathy including inflammatory amyloid angiopathy and the proposed diagnostic criteria in literature. 
 
 Conclusion: The aim of this pictorial review is to provide an overview of the differential diagnoses related to cerebral microhaemorrhages and their clinical significance.

CEREBRAL MICROHAEMORRHAGES: A PICTORIAL REVIEW