ArticleRadiology case reports2026
Right atrial diverticulum on coronary CT: Imaging appearance of a remnant of the right sinus venosus.
Article in Radiology case reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Right atrial diverticulum is a rare congenital anomaly that is most often detected incidentally on cardiac imaging. We report the case of a 51-year-old patient who underwent coronary computed tomography angiography for exclusion of coronary artery disease, in whom a small saccular outpouching measuring 6 mm was identified arising from the anterolateral wall of the right atrium. The lesion demonstrated a communicating neck and homogeneous contrast opacification identical to the atrial cavity. This characteristic location corresponds embryologically to the incorporation site of the right sinus venosus into the primitive atrium, a region recognized for structural remodeling during cardiac development. Recognition of this entity is essential to differentiate it from atrial appendage variants, aneurysms, or pericardial lesions.
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