1Tsuta K, Ishii G, Yoh K, et al. Primary lung carcinoma with signer ring cell carcinoma components: clinicopathological analysis of 39 cases. Am J Surg Pathol, 2004, 28(7) :868
2Castro CY, Moran CA, Flieder DG, et al. Primary signet ring cell adenocardnomas of the lung: a clinicopathological study of 15 cases Histopathology, 2001,39(4):397
