Fig. 1

Neuroimaging and pathological findings in the first hospitalization. CT shows midbrain compression (a, red arrow) and herniation of falx cerebri caused by a massive solid-cystic lesion (a, yellow arrow). Axial T1-WI shows a massive cystic lesion in the left temporal lobe with short T1 signals (b, yellow arrow) and midline shift (b, red arrow). T2-WI shows abnormal long T2 signals (c, red arrow) in the cystic region with cerebral edema around the cyst (c, yellow arrow) and midbrain compression (c, green arrow). Flair imaging shows equal and even signals (d, arrow) in the cystic region. Coronal gadolinium-enhanced magnetic resonance imaging shows the cystic lesion is not enhanced (e, arrow) and did not extend from the skull base. Postoperative CT shows the midline shift (f, red arrow) and cerebral edema (f, yellow arrow) are alleviated. Pathological examination (g, hematoxylin & eosin stain, ×100) of the cystic wall of lesions and cyst-fluid smear examination (h) does not indicate the presence of tumor cells. CT: Computed tomography, Flair: Fluid attenuated inversion recovery, WI: weighted image