PMC8131682_01
(A) CT of the brain demonstrates the mass filled with calcified components. (B) After injection of Gd, a heterogeneous enhanced lesion, extending to the medulla oblongata and C1 spine, was displayed on T1-weighted sagittal image. (C) A neurosurgery was performed via a midline sub-occipital approach. (D) Osteoid components were removed during operation. (E,F) Photomicrographs showing the bone structure and lipid dropletof the lesion. (H,E) original magnification x 100 and x 200. (G) Postoperative enhanced MRI showed no residual or recurrence at three months of fellow up.
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F1
Subsequently, MRI examination (Figure 1) indicated a markedly large mass from the medulla oblongata to C1 spine with a size of 3.1 cm. Pathological examination (Figure 1) found well-differentiated bone tissue, some squamous epithelium and fatty tissue within the mass.