PMC6106699_01
Abdominal computed tomography revealed a hypovascular cystic mass in segments 6 and 7 of the liver measuring 11.5 x 9.0 cm with ring enhancement and partial solid component.
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Abdominal computed tomography (CT) revealed a hypovascular cystic mass in segments 6 and 7 of the liver measuring 11.5 x 9.0 cm with ring enhancement and partial solid component (Fig. 1).
Magnetic resonance imaging demonstrated a liver mass with cystic and irregular solid components measuring 11.5 x 9.0 cm. T1- and T2-weighted imaging showed a hypointense mass with partial hyperintensity and a nonuniform hyperintense mass, respectively (A, B). Dynamic contrast enhancement revealed a hypointense mass with a hyperintense area around the tumor (C).
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Therefore, magnetic resonance imaging was additionally performed at 12 days after the initial visit, showing a liver mass with cystic and irregular solid components measuring 11.5 x 9.0 cm (Fig. 2A-C).
Positron emission tomography showed a hypermetabolic lesion in the area surrounding the tumor (A), and a strong signal was also observed along the PTAD tube (B) (SUVmax: 4.80).
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Positron emission tomography showed a hypermetabolic lesion in the area surrounding the tumor, and a strong signal was also observed along the PTAD tube (SUVmax: 4.80) (Fig. 3A, B).
The excised specimen showed a solid and irregular tumor with central necrosis.
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The excised specimen showed a solid and irregular tumor with central necrosis (Fig. 4).
The microscopic findings. Oval- and spindle-type tumor cells were diffusely shown (A) (HE, 400x). AE1/AE3 (B), vimentin (C), and G-CSF (D) were positive on an immunohistochemical study (200x).
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A pathological examination revealed the diffuse presence of oval- and spindle-type tumor cells (Fig. 5A). Immunohistochemical studies showed that AE1/AE3 and vimentin were positive (Fig. 5B, C), and cytokeratin 19 was focally positive. G-CSF was found to be focally positive in the immunohistochemical study (Fig. 5D).