編號	器官	診斷
2059	Lymph node	Squamous cell carcinoma. Metastatic

	Figure 1) Metastatic squamous cell carcinoma in the lymph node. The carcinoma nearly completely replaces the whole lymph node (arrow). Some residual lymphoid tissue is also found.
	(Figure 2) Metastatic squamous cell carcinoma in the lymph node. Keratin pearls are frequently found at low magnification.
	(Figure 3). Keratin pearl with concentrically arranged keratin (arrowhead) and tumor cells (arrow)
	(Figure 4) The tumor cells arranged in nests. The tumor cells have increased nucleus to cytoplasm ratio, hyperchromasia, coarse chromatin, irregular nuclear membrane, and prominent nucleoli.