5Chan JKC. Tumors of the lymphoreticular system , including spleen and thymus. In: Fletcher CDM, ed. Diagnostic histopathology of tumors. Vol 2, 2nd ed, London: Churchill Livingstone, 2000: 1276~86.
6Rosai J. World health organization international histological classification of tumours. Histological typing of tumours of the thymus. Berlin: Springer-Verlag, 1999:12.
7Okumura M, Ohta M, Tateyama H, et al. The World Health Organization histologic classification system reflects the oncologic behavior of thymoma: a clinical study of 273 patients.Cancer, 2002,94:624~32.
8Chalabreysse L, Roy P, Cordier JF, et al. Correlation of the WHO schema for the classification of thyvmic epithelial neoplasms with prognosis: a retrospective study of 90 tumors. Am J Surg Pathol, 2002,26:1605~11 .
9Muiller-Hermelink HK, Marx A. Towards a histogenetic classification of thymic epithelial tumouts? Histopathology, 2000,36:466~9.
10Kirchner T, Schalke B, Buchwald J ,et al. Well-differentiated thymic carcinoma. An organotypical low-grade carcinoma with relationship to cortical thymoma. Am J Surg Pathol, 1992,16:1153~69.