Published in:
01-08-2019 | Liposarcoma | Classics in Abdominal Radiology
Phantom (invisible) organ sign
Published in: Abdominal Radiology | Issue 8/2019
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The “phantom organ sign” refers to the obscuration of a small organ when a large mass arising from it renders the organ invisible (Figs. 1 and 2). The sign can be seen, for example, in lesions arising from the adrenal gland: pheochromocytoma, large adenoma, and adrenocortical carcinoma [1].
Fig. 1
Axial CT image showing a large right primary adrenal mass histologically proven adrenal adenoma (green asterisk) obscuring any normal adrenal tissue: the phantom organ sign. On the left side, an extra-adrenal mass—a retroperitoneal liposarcoma (red asterisk)—displaces the left adrenal gland
Fig. 2
One of literature’s most famous invisible phantoms. First editions cover of “The Invisible Man” by H. G. Wells (London: Pearson, 1897).
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