PMC9524570_01
MRI images of the lesion. (A) Preoperative brain MRI images. (B) Postoperative brain MRI images.
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F1
Preoperative brain magnetic resonance imaging (MRI) showed a well-demarcated, oval mass measuring 17 x 11 x 10 mm in the right cerebellopontine angle (Figure 1A). Postoperative brain MRI showed that the tumor had been completely removed (Figure 1B), and the patient was discharged on the 18th postoperative day.
Intraoperative photography and histopathological examination of the lesion. (A) Intraoperative view: the lesion was dark-red, had an abundant blood supply, and contained vessel-like structures (white arrow). (B) Intraoperative view: the lesion was resected en bloc. (C) Intraoperative view: the right trigeminal nerve motor root was carefully preserved (white arrow). (D) Histopathological examination of the lesion (magnification x 100).
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F2
The lesion was dark-red, had an abundant blood supply, and contained vessel-like structures (Figure 2A). Eventually, the lesion was resected en bloc (Figure 2B). However, the right trigeminal nerve motor root was carefully preserved (Figure 2C). Microscopically, malformed vascular tissue and hyaline degeneration of the vascular wall were observed (Figure 2D).