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Atrial fibrillation (AF) can lead to embolic stroke and in subjects with non-valvular AF most of thrombi are sited in the left atrial appendage (LAA). LAA is a structure located in the free wall of heart with a wide variable and complex anatomy. LAA occlusion (LAAO) could be taken in consideration in subjects with non-valvular AF and who cannot have long-term anticoagulant therapy. It is a complex preventive procedure given the high variability of patients characteristics and several LAAO devices available nowadays. Moreover, the ideal postprocedural antithrombotic strategy is still unclear. In this review we aim to describe clinical features of patients committed for LAA occlusion and the function of multimodality imaging in subjects selection, procedural management and follow up.

We report a case of a sixth-month-pregnant 37-year-old woman with abdominal pain with the presence of a dermoid cyst of the left ovary. The diagnostic work-up required a multi-modality imaging approach. In particular, US and MR examinations were initially performed but resulted with an inconclusive outcome of a final diagnosis. Hence, a CT scan was successively used to formulate lesion characterization. Thus, integrated imaging approach would be recommended. Keywords: Dermoid cyst, Ovarian teratoma, Pregnancy, Multimodality imaging