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1
Department of Radiology, Samsung Medical Center, Sungkyunkwan University
School of Medicine, 50, Ilwon-Dong, Kangnam-Ku, Seoul 135-710, Korea.
2
Department of Radiology, Osaka University Graduate School of Medicine, Osaka
565-0871, Japan.
3
Department of Diagnostic Pathology, Samsung Medical Center, Sungkyunkwan
University School of Medicine, Seoul 135-710, Korea.
4
Department of Radiology, Kurume University School of Medicine, Kurume,
Fukuoka, 830-0011, Japan.
5
Samsung Biomedical Research Institute, Samsung Medical Center, Sungkyunkwan
University School of Medicine, Seoul 135-710, Korea.
OBJECTIVE. The purpose of our study was to correlate the high-resolution CT findings of small peripheral adenocarcinoma of the lung with underlying histopathology and to evaluate the prognostic implications of the CT findings.
MATERIALS AND METHODS. The high-resolution CT findings of small peripheral adenocarcinoma of the lung in 224 patients were analyzed by two independent observers for location, size, marginal characteristics, and extent of ground-glass opacity and necrosis. The pathologic specimens were reviewed by an experienced lung pathologist.
RESULTS. One hundred and thirty-two patients had bronchioloalveolar carcinoma and 92 had adenocarcinoma. The extent of ground-glass opacity was greater in bronchioloalveolar carcinomas (mean ± SD, 29% ± 31.6%) than in other adenocarcinomas (8% ± 13.3%) (p < 0.001). The extent of ground-glass opacity was significantly greater in patients without recurrence (p = 0.020) and those without nodal (p = 0.017) or distant (p = 0.007) metastases than in patients with nodal or distant metastases or in whom the carcinoma had recurred.
CONCLUSION. The extent of ground-glass opacity in a nodule is greater in bronchioloalveolar carcinomas than in other adenocarcinomas. Greater extent of ground-glass opacity also correlates with improved prognosis.
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