PMC3934770_01
Diffuse 2-3-Hz waves can be seen, remixed with sharp waves in the left frontal-central regions, superimposed on a fairly well-organized 5-6-Hz background rhythm.
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F1
EEG showed moderately diffuse slowing (fig. 1).
Computed tomography of the pelvis shows a large, unevenly enhanced, heterogeneous solid-cystic tumor, with a thick septum on the left side. Solid and cystic parts of the tumor can be seen in circles 1 and 2, respectively.
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F2
To localize the suspected malignancy, the patient underwent computed tomography scans of the chest and abdomen, which disclosed a large mass in the left ovary (fig. 2).
H&E-stained slides show glands and cysts of variable sizes with papillary tufting lined by gastrointestinal-type mucinous epithelium with mild to moderate atypia, a few goblet cells, and rare paneth cells.
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F3
She underwent surgery, and a 20-cm ovarian intestinal-type mucinous tumor (fig. 3) was removed.
A second EEG was done 2 weeks after surgery and was normal. It showed well-organized, bilaterally synchronous activity, and a symmetrical 7-9-Hz background rhythm, devoid of any slow or sharp waves.
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F4
Her second EEG at this stage was normal (fig. 4).