case_images: PMC6689955_01
case_images: Pre-operative magnetic resonance images revealed a cystic lesion that was T1 hypointense, T2 hyperintense, and peripherally enhancing within the left cerebellopontine angle wrapping around the lateral brainstem. Adjacent to the cystic lesion was a T1 isointense, T2 hyperintense, avidly enhancing infiltrative component involving the brainstem, cerebellar peduncle, and cerebellum. (A) Coronal T1-weighted contrast enhanced. (B) Axial T1-weighted contrast enhanced. (C) Sagittal T1-weighted contrast enhanced. (D) Diffusion weighted-imaging. (E) Apparent diffusion coefficient. (F) Fluid-level attenuated inversion recovery.
case_images: fonc-09-00694-g0001.jpg
case_images: PMC6689955_01_fonc-09-00694-g0001.jpg
case_images: F1
case_images: Adjacent to the cystic lesion was a T1 isointense, T2 hyperintense, avidly enhancing infiltrative component involving the brainstem, cerebellar peduncle, and cerebellum (Figure 1).
case_images: Hemotoxylin and eosin stain demonstrating keratin material with small clusters of atypical squamoid cells and keratin pearls consistent with squamous cell carcinoma. (A) 10x magnification. (B) 20x magnification.
case_images: fonc-09-00694-g0002.jpg
case_images: PMC6689955_01_fonc-09-00694-g0002.jpg
case_images: F2
case_images: Pathology demonstrated keratinizing SCC with some sections consisting of almost entirely anucleated keratin material (Figure 2).