JMA Journal

Figure 1. Clinical course.
AAF: amino acid--based formula; Alb: albumin; Eo: eosinophil counts; Hb: hemoglobin; MRI: magnetic resonance imaging; TARC: thymus and activation-regulated chemokine; US: ultrasonography.

Figure 2. Intracranial ultrasonography.
Ultrasonography on day 41 showed a cystic change with a surrounding hyperechoic around the right frontal horn of the lateral ventricle. Coronal (A) and sagittal views (B) are shown.

Figure 3. Head MRI.
Head magnetic resonance imaging on day 46 showed DMVT and associated peripheral post-infarction changes, such as cystic encephalomalacia, confirming cerebral venous infarction. Axial T1-weighted images demonstrate linear hyperintense lesions in right frontal lobe (A). The corresponding T2-weighted image shows linear hypointense alterations at the same location (B). Susceptibility-weighted imaging did not show any hypointense signals in the affected area, suggesting a thrombotic rather than hemorrhagic process (C). These linear signal changes are suggestive of DMVT. Cystic encephalomalacia is observed in the surrounding parenchyma, indicating secondary tissue degeneration. No thrombosis was observed in the cerebral venous sinuses.
DMVT: deep medullary venous thrombosis; MRI: magnetic resonance imaging.