Article

Lung metastases in metastatic gastric cancer: Pattern of lung metastases and clinical outcome

Division of Hematology-Oncology, Department of Medicine, Sungkyunkwan University, Samsung Medical Center, Seoul, 135-710, Korea.
Gastric Cancer (Impact Factor: 3.72). 10/2011; 15(3):292-8. DOI: 10.1007/s10120-011-0104-7
Source: PubMed

ABSTRACT

There are only limited data regarding pulmonary metastasis from gastric cancer. Therefore, we analyzed large series of gastric cancer with pulmonary metastasis and analyzed their clinical characteristics and treatment outcome to enhance perception of metastatic gastric cancer.
Of 20,187 advanced gastric cancer patients treated between 1995 and 2007, 193 (0.96%) were identified to have pulmonary metastasis from gastric cancer. The pulmonary lesions were detected at chest computed tomography (CT) scan or plain chest X-ray and/or abdominal pelvic CT scan covering the lower part of the lungs, and were divided into three patterns: lymphangitic, hematogenous, and pleural.
The most frequently observed pattern of lung metastasis was hematogenous metastasis (52.3%) followed by pleural (35.2%) and lymphangitic (26.4%). Patients who had hematogenous pulmonary metastasis were significantly associated with hepatic metastasis (p = 0.004) and male sex (p = 0.012). Patients with lymphangitic metastasis were significantly associated with concomitant bone (p = 0.010) and bone marrow (p = 0.029) metastasis. In case of pleural metastasis, it was positively correlated with gastrectomy history (p = 0.015) and the presence of peritoneal metastasis (p = 0.020). After a median follow-up duration of 87 (9-162) months, the median survival after diagnosis of pulmonary metastasis was 4 (0-67) months.
The most frequently observed pattern of lung metastasis was hematogenous metastasis (52.3%) followed by pleural (35.2%) and lymphangitic (26.4%) in gastric cancer patients. Among gastric cancer patients with lung metastases, patients with pleural metastasis or lymphangitic metastasis had shorter survival with 1.5-2-fold increased risk of deaths.

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    • "All these findings suggest that there may be a relationship between bone and bone marrow metastasis, and possibly between poor differentiation and unusual metastatic sites, including the bone and bone marrow. Kong et al.17 reported that there were 193 (0.96%) patients with pulmonary metastases among 20,197 patients with advanced gastric cancer; further, 34 (17%) of the patients with lung metastasis also had bone metastasis and 11 (5.7%) patients had bone marrow metastasis as well as lung metastasis. Besides, 58% of the patients had poorly differentiated or signet ring cell histopathology. "
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    ABSTRACT: Background: Because carcinomatous lymphangitis and carcinomatous pleuritis are the usual forms of metastasis associated with gastric cancer, resection of solitary pulmonary metastases arising from gastric cancer is rarely performed. To clarify the characteristics of pulmonary metastases from gastric cancer, we investigated patients who underwent resection of metastatic solitary lung tumors arising from gastric cancer. Methods: Between October 2003 and October 2012, 10 patients underwent pulmonary metastasectomy for metastatic gastric cancer at our institution. We retrospectively evaluated features of the primary gastric cancer and the clinicopathological features of the pulmonary metastases in these cases. Results: 70% of the patients had stage II disease. Lymphatic invasion was observed in all cases of primary gastric cancer. The method of pulmonary resection was partial resection in 5 cases, segmentectomy in 1, and lobectomy in 4. On histopathological examination, immunohistochemical staining was negative for thyroid transcription factor-1 and napsin A in all cases. Patients who underwent resection of pulmonary metastases arising from gastric cancer had a good prognosis: the 4-year survival rate was 75%. Conclusions: Carefully chosen patients have a good opportunity to obtain benefits from resection of pulmonary metastases arising from gastric cancer.
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