Hepatic hemangioma is a relatively common benign tumor of the liver, most commonly known as cavernous hemangioma. There is no evidence that it has the potential to become malignant. According to the pathology, there are 4 types: (1) cavernous hemangioma is the most common; (2) sclerosing hemangioma; (3) hemangioendothelioma; (4) capillary hemangioma. Classification according to tumor size: (1) small hemangioma <5cm; (2) hemangioma 5-10cm; (3) giant hemangioma 10cm-15cm; (4) very large hemangioma >15cm. This classification has some significance for the treatment plan of hepatic hemangioma. MRI performance】 MRI examination shows low signal in T1-weighted and high signal in T2-weighted, with uniform intensity and clear edges, and contrast with the surrounding liver, which is described as the “light bulb sign”, which is the specific performance of hemangioma in MRI. A. T2WI fat suppression: high signal; B. T1WI isochronous image: low signal; C. Typical peripheral node-like enhancement; D. Delayed phase: continuous uniform enhancement is still seen. Pathological manifestations】 The tumor consists of blood vessels of different sizes, and the lumen contains red blood cells with a sponge-like structure. Differential diagnosis】 Typical diagnosis is very easy, but atypical hemangioma needs to be differentiated from mucinous malignant tumor.