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  • Title: Combined status of MUC1 mucin and surfactant apoprotein A expression can predict the outcome of patients with small-size lung adenocarcinoma.
    Author: Tsutsumida H, Goto M, Kitajima S, Kubota I, Hirotsu Y, Yonezawa S.
    Journal: Histopathology; 2004 Feb; 44(2):147-55. PubMed ID: 14764058.
    Abstract:
    AIM: Lung cancer is still a disease of high mortality, despite advanced diagnostic techniques. Here, we aim to report a unique method to predict the recurrence and outcome of patients with pulmonary adenocarcinomas. METHODS AND RESULTS: Immunohistochemical expression of MUC1 mucin and surfactant apoprotein A (SP-A) was examined in 185 cases of surgically removed lung adenocarcinomas of non-bronchioloalveolar type smaller than 30 mm. Staining results were evaluated semiquantitatively, and the expression of MUC1 and SP-A was compared in each case. There were 140/185 (76%) cases showing MUC1 expression higher than SP-A expression (MUC1>SP-A), and 45/185 (24%) cases showing MUC1 expression lower than or equal to SP-A expression (MUC1<or =SP-A). Recurrence was observed in 24% (34/140) of the patients with a MUC1>SP-A pattern, but in 7% (3/45) of the patients with a MUC1< or =SP-A pattern after the median observation period of 41 months (1-99 months) (P < 0.01). The MUC1>SP-A group showed higher recurrence and worse survival than the MUC1<or =SP-A group by Kaplan-Meier's method (P < 0.01 and P < 0.005). Even in the patients with apparently favourable prognostic factors (well-differentiated adenocarcinoma or no lymph node metastasis), recurrence and survival were different between the two groups. CONCLUSIONS: A high MUC1/SP-A ratio is strongly associated with a poor outcome in patients with small-size lung adenocarcinoma.
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