case_images: PMC11789880_01
case_images: The images show a mass in the right atrium. (A) Echocardiography transcardial apex section: a 4.69 x 3.49 cm2 mass in the right atrium, with a regular shape, no lobulation, attached to free wall, and mobile (red arrow). (B) Cardiac CTA perfusion imaging demonstrated a homogenous low-density mass (-114 HU) in the right atrium, measuring 6.0 x 4.1 cm2, with a clear boundary. No enhancement was observed on the enhanced scan (red arrow). CTA = computed tomography angiography.
case_images: medi-104-e41329-g001.jpg
case_images: PMC11789880_01_medi-104-e41329-g001.jpg
case_images: F1
case_images: Color Doppler flow imaging analysis failed to detect any blood flow signals into the mass (Fig. 1A). No enhancement was observed within the mass (Fig. 1B and Supplemental Video S1, Supplemental Digital Content, http://links.lww.com/MD/O325).
case_images: The images show the mass observed during and after surgery. (A) A yellow, soft, and smooth tumor located in the right atrium. (B) In vitro: a wide-based yellow tumor is shown (marked with a red pentagram). (C) Sectioning the tumor reveals adipose tissue with a uniform texture. (D) HE staining (x10) demonstrated numerous adipocytes. HE = hematoxylin and eosin.
case_images: medi-104-e41329-g002.jpg
case_images: PMC11789880_01_medi-104-e41329-g002.jpg
case_images: F2
case_images: The tumor's base was anchored to the anterolateral, unsupported wall of the right atrium, displaying an attachment width of roughly 3 x 4 cm2 (Fig. 2A-C). Upon histopathological examination, it was ascertained that the tumor comprised numerous adipocytes (Fig. 2D), whereas the borders of the atrial wall adjacent to the tumor were devoid of adipocytes.