- Protein Expression and Gene Amplification of Epidermal Growth Factor Receptor in Non-Small Cell Lung Cancer: Correlation with the Response to Gefitinib Therapy.
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Jinyoung Yoo, Kyungji Lee, Ji Han Jung, Byoung Yong Shim, Sung Hwan Kim, Deog Gon Cho, Myeong Im Ahn, Chi Hong Kim, Kyu Do Cho, Hoon Kyo Kim, Seok Jin Kang
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Korean J Pathol. 2008;42(1):1-8.
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 Abstract
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- BACKGROUND
Gefitinib is an EGFR tyrosine kinase inhibitor that has shown dramatic effectiveness in a subset of non-small cell lung cancer (NSCLC) patients. We evaluated the response rate to gefitinib, and the significance of the EGFR and HER2/neu status as predictive markers of the tumor response.
METHODS
The EGFR and HER2/neu protein expressions, as determined by immunohistochemistry (IHC) and gene amplification via chromogenic in situ hybridization (CISH), were analyzed in biopsy specimens from 46 patients with advanced NSCLC. After their failure with the first-line treatment, all the patients had received gefitinib treatment.
RESULTS
A partial response (PR) was achieved in 8 patients (17.4%). An EGFR overexpression was detected in 80.4% (37/46) of the tumors, and this was observed exclusively in patients with a PR (100% vs 75.3%, respectively; p=0.076).
EGFR gene amplification was present in 47.8% of the tumors (22/46). HER2/neu was overexpressed in 13%(6/46) and it was amplified in 17% (7/46). The overall survival was prolonged in the female patients (p=0.007), and in patients with T1 and T2 disease (p=0.039), adenocarcinoma (p=0.010), a PR (p=0.022), an EGFR IHC+ status (p=0.033), an EGFR IHC+/CISH+ status (p=0.010), or an EGFR+/HER2/neu+ status (p=0.030). On multivariate analysis, gender, T disease and EGFR IHC/CISH remained the significant predictors of survival.
CONCLUSIONS
Gefitinib showed a modest effect for the patients with chemotherapy-refractory advanced NSCLC. A combination of EGFR IHC and CISH might be important for identifying those patients who are most likely to benefit from gefitinib therapy.
- Expression of Thymidylate Synthase in Non-Small Cell Lung Cancer.
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Jinyoung Yoo, Suzi Kim, Byoung Yong Shim, Sung Hwan Kim, So Hyang Song, Deog Gon Cho, Meyung Im Ahn, Chi Hong Kim, Kyu Do Cho, Seok Jin Kang, Hoon Kyo Kim
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Korean J Pathol. 2005;39(6):412-417.
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Abstract
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- BACKGROUND
Thymidylate synthase (TS) catalyzes the methylation of deoxyuridine monophosphate (dUMP) to deoxythymidine monophosphate (dTMP), and this is an essential step in DNA biosynthesis. The present investigation was designed to determine the expression of TS in the patients with non-small cell lung cancer (NSCLC) and to assess the possible associations between the TS status and the p53 or proliferative index (PI).
METHODS
The archival tumor tissues from 56 previously untreated NSCLC patients were examined by immunohistochemistry for TS, p53 and Ki-67.
RESULTS
Forty-one men and 15 women (age range: 35 to 79 years, mean age: 62 years) were included in this study. The TS expression was high in 40 patients (71.4%) and low in 16 patients (28.6%). The aberrant expression of p53 was detected in 35 patients (62.5%). The mean PI for all the patients was 31.4+/-12.1. The TS-high tumors tended to be more poorly differentiated (p=0.069). The TS expression by a semiquantitative fourscale grading system was significantly correlated with the PIs (p=0.003). No correlation was established between the TS expression and the p53 status (p=0.806) or survival (p=0.951). CONCLUSIONS: TS was not confirmed to be a useful marker for determining the prognosis of NSCLC patients. However, our data suggest that the tumor cells with higher TS expression have a higher proliferative activity.
- Primary Pulmonary Hodgkin's Lymphoma: A case report.
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Mi Seon Kwon, Kyo Young Lee, Chang Suk Kang, Byung Kee Kim, Sang In Shim, Myeong Im Ahn, Chi Hong Kim
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Korean J Pathol. 1999;33(4):285-287.
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Abstract
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- Primary pulmonary Hodgkin's lymphoma is a rare but distinct entity to be distinguished from nodal Hodgkin's lymphoma and from lymphomas involving lung secondarily. This lymphoma affects women more frequently than men, and typically involves superior portions of the lung. This case is reported to illustrate the clinical, radiographic and anatomic characteristics of the primary pulmonary Hodgkin's lymphoma. A 34-year-old woman presented for the evaluation of hemoptysis. A chest CT revealed a large poorly defined mass in the medial aspect of the right upper lobe, extending to the right mediastinum and trachea. The microscopic examination of the biopsied lesion revealed fibroblastic stroma infiltrated by a mixture of lymphocytes, histiocytes, and eosinophils. The clinical impression was inflammatory pseudotumor, presumably due to slightly favorable response to corticosteroid therapy. Two months later the patient's symptoms worsened despite the steroid therapy and a lobectomy was done. The specimen showed a soft to firm, pale yellow, ill defined mass, 10.0 8.0 cm, involving the visceral pleura. A few satellite nodules around the main mass were noted. The histologic findings were consistent with Hodgkin's lymphoma, nodular sclerosis type.
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