PMC8435557_01
Doppler echocardiogram images (a and b) show a hypoechoic mass at the edge of the hepatic caudate lobe and no obvious blood flow signal in the mass. Contrast-enhanced venous phase CT image of the abdomen (c) reveals a concentric round, well-defined nonenhanced mass (arrow) with central calcification. Fat-suppressed T2-weighted images and gadolinium-enhanced fat-suppressed T1-weighted MR images (d-f) show a hypointense mass as muscle tissue without any enhancement (arrow).
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It contained hyperintense echogenic foci with posterior acoustic shadowing, indicating dense calcifications, and no obvious blood flow signal was detected in the mass (Figure 1a and b). The CT images of the abdomen presented a well-circumscribed, round-like lesion, which was solid with punctate calcification in the center, and no contrast-enhancement was observed in the lesion area by a contrast-enhanced scan (Figure 1c). Furthermore, no evidence of enhancement was found through the dynamic contrast-enhanced scan (Figure 1d-f).
Laparoscopy (a) presents a pure white, elastic, egg-shaped body in the second hilar region and near the caudate lobe. Gross pathologic examination (b) presents a lesion of white in appearance with a smooth surface. The cross-section displays a core filled with yellow material.
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The cut surface showed a core with yellow material (Figure 2a and b).
Photomicrograph shows (a) the necrotic and mechanized adipose tissue in the center of the free body, and its periphery surrounded by dense connective tissue and (b) the dense collagen connective tissues around the central degenerated region arranged in concentric circles. (hematoxylin and eosin, a x40 and b x100 original magnification).
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Microscopically, the center of the lesion was composed of partially necrotic adipose tissue, and the periphery contained wrapped fibrous tissue with significant hyaline degeneration (Figure 3).