[Sonographic patterns of littoral cell angioma: case report and review of the literature].

Aim: Littoral cell angioma is a rare benign tumour of vascular proliferation unique to the spleen. Definitive sonographic patterns are yet unknown and are described in this paper.
Method: We report about 2 patients with histologically confirmed Littoral cell angioma. The sonographic features of these and 5 additional cases in the literature are presented.
Results: Littoral cell angioma is characterized by splenomegaly (6 out of 7 cases) with small nodular hyperechoic focal lesions (6 out of 7 cases). A solitary hyperechoic tumour (1 out of 7 cases) is a rare event.
Conclusion: Littoral cell angioma is a recently discovered tumour and should be included in the differential diagnosis of a hyperechoic splenic tumour.