Prognostic Implication of Predominant Histologic Subtypes of Lymph Node Metastases in Surgically Resected Lung Adenocarcinoma

Figure 1

Representative photo-micrographs of primary lung tumors and metastatic lesions of lymph nodes. All of these four patients had papillary-predominant primary lung tumors (left), but developed lymph node metastases that were papillary-predominant (a), acinar-predominant (b), solid-predominant (c), and micropapillary-predominant (d), as shown on the right. Colored bar graphs indicate the proportion of histologic subtypes. In primary lung tumors (left), proportions of each histologic subtype present are estimated in 5% increments. Histologic subtypes in metastatic lymph nodes (right) were recorded as a binary variable.

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