PMC3825928_01
Incidental finding of hypoenhancing hepatic lesion noted on CT conducted in response to elevated ESR and CRP.
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Unexpectedly, the CT revealed a 10 cm hypoenhancing lesion in the right anterior sector plus left medial section of the liver (Fig. 1).
MRI revealing mass in the right anterior sector plus left medial section of the liver with internal cystic component.
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The lesion was noted to have an internal cystic component (Fig. 2).
Left lateral segment hypertrophy. The image at left shows the liver before portal vein embolization (PVE), with a small left lateral segment (1067.391 cm3). The figure at right demonstrates scatter from embolization of the right portal vein, as well as significant hypertrophy of the left lateral segment (1801.602 cm3).
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Six weeks after PVE, cross sectional imaging demonstrated that segments 1,2, and 3 had hypertrophied from 18% to 33% of total liver volume, providing an adequate liver remnant for right trisectionectomy (Fig. 3).
Transition of normal ciliated foregut cyst wall (A) to in situ squamous cell carcinoma (B). On the left (A), the cyst wall resembles that of a bronchogenic cyst. The wall itself is thinner and contains fewer mitoses, which are appropriately located along the basement membrane. On the right (B), the wall is thicker. Here, mitoses are more frequent, and are no longer limited to locations along the basement membrane.
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The cyst was lined with pseudostratified ciliated columnar epithelium and had regions of wall-thickening (Fig. 4).