編號	器官	診斷
2111	Cerebellum	Pilocytic astrocytoma

	(Figure 1) Pilocytic astrocytoma with microcysts (arrow).
	(Figure 2) Pilocytic astrocytoma with microcysts (arrow) alternating with the area with tumor cells with hair-like processes (arrowhead).
	(Figure 3) The neoplastic astrocytes with long cytoplasmic (hair-like ) processes (arrow).
	(Figure 4) The hair-like processes of the tumor cells (arrow) and bright eosinophilic Rosenthal fibers (arrowhead). The pheomorphism of the tumor cells are minimal.
	(Figure 5) The hair-like processes of the tumor cells (arrow) and bright eosinophilic Rosenthal fibers (arrowhead).
	(Figure 6) Rosenthal fibers in the pilocytic astrocytoma (arrow).
	(Figure 7) In the microcyte areas, the tumor cells had short cytoplasmic processes (arrow).