編號	器官	診斷
1931	Esophagus	Squamous cell carcinoma

	Figure 1) Squamous cell carcinoma of esophagus (arrow). The carcinoma has invaded the submucosa.(M:mucosa, SM: submucosa, MO: muscularis propria).
	(Figure 2) Normal squamous epithelium of esophagus. Note the orderly maturation of the epithelium with gradually increase in the amount of cytoplasm and decrease of the nucleus to cytoplasm ratio.
	Figure 3) Carcinoma in situ of the squamous epithelium (arrow). Carcinoma in situ lesion is seen adjacent to the invasive carcinoma (not shown here). The basement membrane is intact in carcinoma in situ areas. Normal epithelium is seen (arrowhead)
	(Figure 4)Carcinoma in situ of squamous epithelium. The whole layers of the epithelium is replaced by dysplastic cells with enlarged and hyperchromatic nuclei. The basement membrane is intact (arrowhead).
	(Figure 5)Carcinoma in situ of squamous epithelium (arrow). The
	(Figure 6) Invasive squamous cell carcinoma with irregular infiltrating borders (arrow). The carcinoma has invaded the submucosa layer.
	(Figure 7) Invasive squamous cell carcinoma with irregular infiltrating borders (arrow). Desmoplastic stroma is seen. (arrowhead)
	Figure 8) Mark nuclear pleomorphism and hyperchromasia in carcinoma cells. Note high nucleus to cytoplasm ratio irregular nuclear membrane, and frequent mitoses.
	(Figure 9) Focal cancer cell keratinization (arrow)