Objective:To estimate the influence of metabolic parameters in 18F-FDG PET/CT and clinically relevant indicators on the prognosis of patients with cervical cancer. Methods:A total of 174 patients with cervical cancer (age (53.6±11.1) years) who underwent baseline 18F-FDG PET/CT examination in the Affiliated Hospital of Qingdao University from May 2011 to December 2020 were retrospectively collected. Metabolic parameters (metabolic tumor volume of primary lesion (MTV p), total lesion glycolysis of primary lesion (TLG p), MTV sum of total lesions (MTV total) in the whole body, TLG sum of total lesions (TLG total)) and clinical parameters (International Federation of Gynecology and Obstetrics (FIGO) stage, tumor maximum diameter ( Dmax), et al) were collected. Cox regression and Kaplan-Meier method were performed to evaluate the prognostic and predictive values of those parameters. Results:The follow-up time was 6-120 months, during which 52 patients (29.9%, 52/174) developed progression. The 5-year overall survival (OS), progression-free survival (PFS), local control (LC) and distant metastasis-free survival (DMFS) rates were 83.3%(145/174), 70.1%(122/174), 75.3%(131/174) and 82.8%(144/174), respectively. Cox regression showed that FIGO stage and MTV total were independent factors for predicting PFS, OS and LC (hazard ratio ( HR): 1.005-11.605, all P<0.05). FIGO stage and TLG total were independent factors for predicting DMFS ( HR: 1.002-12.258, all P<0.05). Conclusion:MTV total and FIGO stage are effective predictors of patients with cervical squamous cell carcinoma.

Objective:To investigate the value of 18F-FDG PET/CT imaging signs and metabolic parameters in predicting tumor spread through air spaces (STAS) of stage Ⅰ lung adenocarcinoma. Methods:From January 2019 to December 2021, clinical, imaging and metabolic parameters of 381 patients (126 males, 255 females, age (61.2±9.2) years) with stage Ⅰ lung adenocarcinoma were retrospectively analyzed in the Affiliated Hospital of Qingdao University. According to the postoperative pathological results, patients were divided into STAS positive group and STAS negative group. According to the operation time, patients were divided into training set ( n=254) and verification set ( n=127). χ2 test or Mann-Whitney U test was used to compare the differences of different parameters between patients with STAS positive and negative, and binary logistic regression analysis was used to select the predictors of STAS status. The prediction model was established, and ROC curve was used to evaluate the predictive efficacy. Results:There were 49(19.3%, 49/254) patients with STAS positive and 205(80.7%, 205/254) patients with STAS negative in the training set, while those were 35(27.6%, 35/127) and 92(72.4%, 92/127) in the verification set. In the training set, the differences of age ( z=-2.30, P=0.021), type of lesions ( χ2=6.81, P=0.009), spiculation ( χ2=12.64, P<0.001), bronchus truncation ( χ2=6.98, P=0.008), ground glass ribbon sign ( χ2=26.93, P<0.001) and SUV max ( z=-4.62, P<0.001) between the two groups were statistically significant. Multivariate logistic regression analysis showed that age (odds ratio ( OR)=1.048, 95% CI: 1.004-1.094, P=0.032), ground glass ribbon sign ( OR=3.857, 95% CI: 1.693-8.788, P=0.001) and SUV max ( OR=1.133, 95% CI: 1.001-1.282, P=0.049) were independent predictors of STAS status in stage Ⅰ lung adenocarcinoma patients. The logistic regression model was P=1/(1+ e - x), x=-5.292+ 0.480×age (year)+ 1.493×ground glass ribbon sign+ 0.170×SUV max. The AUCs of the model in the training set and verification set were 0.770 and 0.801, with the sensitivity of 81.6%(40/49) and 82.9%(29/35), and the specificity of 69.8%(143/205) and 65.2%(60/92), respectively. Conclusion:Age, ground glass ribbon sign and SUV max have good predictive effects on the occurrence of STAS in stage Ⅰ lung adenocarcinoma.

Objective:To report the clinical features of pulmonary hypertension diagnosed by echocardiography in 5 patients with novel coronavirus pneumonia (COVID-19) in order to understand the special clinical manifestations of COVID-19 and explore the possible mechanism.Methods:The echocardiographic data and clinical characteristics of COVID-19 patients complicated with pulmonary hypertension diagnosed by echocardiography in Beijing Ditan Hospital, Capital Medical University were analyzed descriptively from February 5 to March 31, 2020.Results:A total of 15 patients with severe and critical COVID-19 patients underwent echocardiography. Of them, 7 patients were diagnosed with pulmonary hypertension, 5 of which were confirmed as complications of COVID-19. Among the 5 patients, 4 were female and 1 was male, aged 62-78 years; 4 were with hypertension, 3 were with diabetes, and 1 was with coronary atherosclerotic heart disease. All 5 critically ill patients with COVID-19 were given ventilator-assisted breathing, 2 of which were given extracorporeal membrane oxygenation at the same time. According to echocardiography, the systolic pressure of pulmonary artery in 5 patients was 43-65 mmHg, with an average of 54 mmHg. The severity of pulmonary hypertension was graded as mild in 1 patient and moderate in 4 patients. During the follow-up, pulmonary artery systolic pressure gradually decreased to normal in 4 patients, and then ventilator and ECMO were withdrawn; 1 patient died due to respiratory failure and persistent pulmonary hypertension.Conclusions:Patients with COVID-19 may be complicated by pulmonary hypertension, which is often found in the critical patients. Echocardiography is an important imagingdiagnostic method for pulmonary hypertension in patients with COVID-19.

Objective:To report the clinical features of pulmonary hypertension diagnosed by echocardiography in 5 patients with novel coronavirus pneumonia (COVID-19) in order to understand the special clinical manifestations of COVID-19 and explore the possible mechanism.Methods:The echocardiographic data and clinical characteristics of COVID-19 patients complicated with pulmonary hypertension diagnosed by echocardiography in Beijing Ditan Hospital, Capital Medical University were analyzed descriptively from February 5 to March 31, 2020.Results:A total of 15 patients with severe and critical COVID-19 patients underwent echocardiography. Of them, 7 patients were diagnosed with pulmonary hypertension, 5 of which were confirmed as complications of COVID-19. Among the 5 patients, 4 were female and 1 was male, aged 62-78 years; 4 were with hypertension, 3 were with diabetes, and 1 was with coronary atherosclerotic heart disease. All 5 critically ill patients with COVID-19 were given ventilator-assisted breathing, 2 of which were given extracorporeal membrane oxygenation at the same time. According to echocardiography, the systolic pressure of pulmonary artery in 5 patients was 43-65 mmHg, with an average of 54 mmHg. The severity of pulmonary hypertension was graded as mild in 1 patient and moderate in 4 patients. During the follow-up, pulmonary artery systolic pressure gradually decreased to normal in 4 patients, and then ventilator and ECMO were withdrawn; 1 patient died due to respiratory failure and persistent pulmonary hypertension.Conclusions:Patients with COVID-19 may be complicated by pulmonary hypertension, which is often found in the critical patients. Echocardiography is an important imagingdiagnostic method for pulmonary hypertension in patients with COVID-19.