Abstract: Objective To investigate the relationship between CT imaging findings and pathological types of hepatic angiomyolipoma (HAML).Methods A total of 26 patients with HAML who underwent surgical treatment and confirmed by postoperative pathology from February 2014 to April 2019 were included in the study. There were 5 males and 21 females with an average age of (45.2 ±5.9) years. According to the research of Tsui and other scholars, the pathological classification of HAML was carried out.Results In 6 cases of hemangioma type, most of them existed abnormal blood vessels and smooth muscle cells, which contained adipose tissue components, but the amount was small. None fat density shadow was found in CT imaging the examination showed quasi-circular low density shadow in CT plain scan, continuous enhancement in CT enhancement scan, thick twisted vascular shadow and partial calcification in CT scan. In 4 cases of myoma type, a very small amount of adipose tissue components were found in routine pathology, especially in smooth muscle cells. None adipose tissue was found on CT in 2 patients, and a very small amount of adipose tissue was found in 2 patients on CT. The overall angioma type showed obvious enhancement in arterial phase, slightly higher density in venous phase and delayed phase in CT enhanced scan. In 7 cases of lipoma type, a large amount of adipose tissue components were found in routine pathology. On plain CT scan, there were multiple strips of reticular structure and diffuse density shadow of adipose tissue, while on enhanced CT, there were thick twisted blood vessels in adipose tissue. In 9 cases of mixed type, a variety of tissue components were found in routine pathology, including adipose tissue, distorted blood vessels and smooth muscle cells. The total content of adipose tissue was between 10% and 85%. On plain CT scan, diffuse soft tissue density shadow and adipose tissue density shadow were seen, and the two imaging manifestations were mixed. CT enhanced scan showed none enhancement in adipose tissue components, but obvious enhancement of soft tissue density in arterial phase.Conclusion CT imaging findings can effectively reflect the tissue composition and pathological features of HAML patients. It is valuable for the diagnosis of HAML and has important clinical significance.

Key words: Hepatic angiomyolipoma, Computerized tomography, Omnipaque