PMC7294317_01
(a,b) Sagittal and axial T2-weighted MR image shows a large cystic ovarian tumor of 5cm at maximum diameter. The tumor had arisen from the right ovary, the margin was smooth and the uterus was normal size. (c) Ovarian endometrioid tumor of low malignant potential showing glands similar to the complex hyperplasia of the uterine endometrium.
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F1
She revealed a medical history of ovarian tumor resection [Figure 1a-c].
(a) Brain magnetic resonance venography image obtained on admission showing occlusion of the left transverse and sigmoid sinuses. Magnetic resonance venography image obtained 28 days after admission showing recanalization of the venous sinus (d). (b) 3D TOF MRA showing high-grade left PCA stenosis. Improvement in vasoconstriction is observed on day 14 from ictus (e). (c) SPECT images obtained on day 2 from ictus showing left posterior ischemic lesion. SPECT image obtained on day 28 from ictus showing absence of the ischemic lesion (f).
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F2
MRI (FLAIR and T2* images) revealed left occipital cortical SAH and dural venous sinus thrombosis involving the left transverse and sigmoid sinuses [Figure 2a]. MR angiography (MRA) revealed high-grade left posterior cerebral artery (PCA) stenosis [Figure 2b]. Notably, N-isopropyl-p-[123I] iodoamphetamine (IMP)-SPECT imaging performed on day 2 revealed left posterior ischemic lesions [Figure 2c]; however, these ischemic lesions disappeared on day 28 [Figure 2c]. Her MRV revealed no abnormalities a month later [Figure 2d]. Over the following 2 weeks, gradual improvement in the stenosis was observed on repeat ultrasonography and MRA [Figure 2e]. SPECT image showing absence of the ischemic lesion [Figure 2f].
PMC7294317_02
(a,c) Magnetic resonance angiography (MRA) confirmed the presence of a vasospasm involving the right anterior cerebral artery. On admission, MRA revealed vasoconstriction of the anterior cerebral artery. Vasoconstriction was normalized within 3 months. (b,d) Magnetic resonance venography (MRV) confirmed the presence of a thrombosis involving the superior sagittal sinus. On admission, MRV revealed thrombosis of the superior sagittal sinus, which normalized within 3 months.
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F3
Magnetic resonance angiography (MRA) confirmed the presence of a vasospasm involving the right anterior cerebral artery [Figure 3a]. Magnetic resonance venography (MRV) confirmed the presence of a thrombosis involving the superior sagittal sinus [Figure 3b]. At her 3-month follow-up, MRA and MRV were normal [Figure 3c and d].