XXXX with special attention to radiologic imaging.

@entity1 @entity2477 @entity5 @entity359 @entity157 @entity99
BACKGROUND: @entity359 is a unique mesenchymal @entity5 composed of blood vessels as well as smooth muscle and adipose cells. The liver is a less common site of origin, and @entity99 is often an incidental finding on diagnostic imaging or is identified on evaluation of nonspecific symptoms. CASE PRESENTATION: We experienced four @entity1 who were diagnosed histologically with @entity99 . The preoperative diagnoses were @entity359 in two @entity1 , @entity157 in one, and @entity2477 in one. Three @entity1 were treated with hepatectomy (one laparoscopic and two open approaches), and the diagnosis was completed by histological investigation of the resected specimen. The remaining one was diagnosed from @entity5 needle biopsy. Diffusion-weighted magnetic resonance imaging (MRI) with respiratory triggering using b values of 0 and 800  s/mm(2) was employed. An apparent diffusion coefficient map was generated from b values of 0 and 800  s/mm(2) for calculation of the apparent diffusion coefficient. The apparent diffusion coefficient values were calculated as 3.66, 1.21, 1.80, and 0.91 in @entity1 1 to 4, respectively. In MRI imaging, fat component was clearly demonstrated with chemical shift imaging in three @entity1 . Early venous return was detected in three @entity1 with computed tomography angiography. CONCLUSION: Fat component and early venous return are important for a correct diagnosis of @entity99 . Unfortunately, apparent diffusion coefficient values in @entity99 were overlapping with those in other benign and @entity5 .
