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박형복,정현주,이지현,서용성,황의석,조윤형,조덕규 연세대학교의과대학 2019 Yonsei medical journal Vol.60 No.7
Purpose: To evaluate predictors of severe or moderate coronary artery disease (CAD) in individuals with zero or very low (<10)coronary artery calcium (CAC) scores. Materials and Methods: The 1175 asymptomatic persons with zero or very low (<10) CAC scores were analyzed for CAD stenosisusing coronary computed tomography angiography. Moderate and severe CADs were defined as having more than 50% andmore than 70% stenosis in any of the major coronary arteries, respectively. Age, gender, body mass index, hypertension, type IIdiabetes, dyslipidemia, lipid profile, creatinine, and smoking status were evaluated as predictors for moderate and severe CAD. Results: In the study population, moderate and severe CADs were found in 7.5% and 3.3%, respectively. Among evaluated riskfactors, age [odds ratio (OR) 1.04, 95% confidence interval (CI) 1.02–1.07, p<0.001], current smoking status (OR 3.12, 95% CI 1.82–5.34, p<0.001), and CAC 1–9 (OR 1.80, 95% CI 1.08–3.00, p=0.024) were significantly associated with moderate CAD. Meanwhile,age (OR 1.05, 95% CI 1.02–1.08, p=0.003), low high density lipoprotein (HDL) (OR 0.96, 95% CI 0.93–0.99, p=0.003), and currentsmoking status (OR 2.34, 95% CI 1.14–5.30, p=0.022) were found to be significantly associated with severe CAD. Improvement ofdiscrimination power for predicting severe CAD was observed when smoking and HDL cholesterol were serially added into theage model. Conclusion: Smoking showed significant correlations with moderate or severe CAD, and low HDL cholesterol also proved to be apredictor of severe CAD in asymptomatic individuals with extremely low CAC scores.
Diagnostic Accuracy of a Novel On-site Virtual Fractional Flow Reserve Parallel Computing System
박형복,장영걸,Reza Arsanjani,Minh Tuan Nguyen,이상은,전병환,정성희,홍영택,하성민,김세근,이상욱,장혁재 연세대학교의과대학 2020 Yonsei medical journal Vol.61 No.2
Purpose: To evaluate the diagnostic accuracy of a novel on-site virtual fractional flow reserve (vFFR) derived from coronary computedtomography angiography (CTA). Materials and Methods: We analyzed 100 vessels from 57 patients who had undergone CTA followed by invasive FFR during coronaryangiography. Coronary lumen segmentation and three-dimensional reconstruction were conducted using a completelyautomated algorithm, and parallel computing based vFFR prediction was performed. Lesion-specific ischemia based on FFR wasdefined as significant at ≤0.8, as well as ≤0.75, and obstructive CTA stenosis was defined that ≥50%. The diagnostic performanceof vFFR was compared to invasive FFR at both ≤0.8 and ≤0.75. Results: The average computation time was 12 minutes per patient. The correlation coefficient (r) between vFFR and invasive FFRwas 0.75 [95% confidence interval (CI) 0.65 to 0.83], and Bland-Altman analysis showed a mean bias of 0.005 (95% CI -0.011 to0.021) with 95% limits of agreement of -0.16 to 0.17 between vFFR and FFR. The accuracy, sensitivity, specificity, positive predictivevalue, and negative predictive value were 78.0%, 87.1%, 72.5%, 58.7%, and 92.6%, respectively, using the FFR cutoff of 0.80. They were 87.0%, 95.0%, 80.0%, 54.3%, and 98.5%, respectively, with the FFR cutoff of 0.75. The area under the receiver-operatingcharacteristics curve of vFFR versus obstructive CTA stenosis was 0.88 versus 0.61 for the FFR cutoff of 0.80, respectively; it was0.94 versus 0.62 for the FFR cutoff of 0.75. Conclusion: Our novel, fully automated, on-site vFFR technology showed excellent diagnostic performance for the detection oflesion-specific ischemia.
박형복,조현근,김유진,박경석,우명렬,고근준,오화은,이상엽 대한소화기내시경학회 2010 Clinical Endoscopy Vol.41 No.3
A 42-year-old man without any signs or symptoms of illness underwent esophago- gastroduodenoscopy (EGD) for a routine health check up. On esophagogastroduo- denoscopy, multiple small and yellowish mucosal plaques were detected in the mid to distal esophagus. These plagues proved to be ectopic sebaceous glands of the esophagus according to the histologic examination. On the immunohistochemical staining with anti-Keratin 14, the basal cells and the heterotopic sebaceous glands were immunoreactive for keratin 14. The histogenesis of this extremely rare lesion is not completely clear. There have been some reports on ectopic esophagus sebaceous glands combined with esophageal cancer or gastric cancer. However, malignant transformation of the ectopic sebaceous gland itself has not yet been reported on. This case was regularly followed up for 12 months, and no interval change or malignant transformation was found both endoscopically and histologi- cally. 42세 남자가 건강 검진 목적으로 시행한 상부위장관 내시경에서 중부 및 하부 식도에 황색의 작은 반성(plaques) 병변들이 수십여 개 관찰되어 생검을 하였고 조직병리 검사에서 식도에 발생한 이소성 피지선으로 밝혀졌다. 식도에서 이소성 피지선이 발견되는 경우는 드물며 아직 정확한 발생학적 기원에 대해서도 명확히 밝혀지지 않았다. 일부 보고에서 식도암 또는 위암에서 이소성 피지선이 동반된 경우가 있었으나 이소성 피지선 자체로부터 악성 종양이 발생한 증례는 아직 보고된 바 없다. 본 증례는 1년 후 내시경 및 추적 조직 검사를 하여 특이 변화가 없는 것을 확인하였고, 항 케라틴 14 면역 염색을 하여 이소성 피지선이 식도 상피 세포의 화생의 결과라는 가설에 대해 검증하였다.