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Figure 1: Plain CT head showing hypodense midline posterior fossa lesion (A) with hydrocephalus (B). Ventricles were decompressed after VP shunt (C). Contrast MRI brain showed intense, homogeneous enhancement of the lesion in the fourth ventricle [axial (D), coronal (E), and sagittal (F)]. CT head showing hydrocephalus (G) with ascites revealed on X-ray abdomen (H). Postoperative CT head showing total excision of tumor with resolution of hydrocephalus (I)

Figure 1: Plain CT head showing hypodense midline posterior fossa lesion (A) with hydrocephalus (B). Ventricles were decompressed after VP shunt (C). Contrast MRI brain showed intense, homogeneous enhancement of the lesion in the fourth ventricle [axial (D), coronal (E), and sagittal (F)]. CT head showing hydrocephalus (G) with ascites revealed on X-ray abdomen (H). Postoperative CT head showing total excision of tumor with resolution of hydrocephalus (I)