Large cell neuroendocrine lung cancer（LCNEC） is the rare subtype of nonsmall cell lung cancer. Because of its low incidence rate and the special biological behaviour, it is hard to define in pathology. And we also know little about its epidemiological feature and the purposeful therapy view of LCNEC, and the therapeutic effect is unsatisfactory. This article will review and introduce the advance of research, clinical diagnosis and therapeutic of the LCNEC.
Objective To evaluate the imaging features of pancreatic neuroendocrine carcinoma （PNEC）. Methods The imaging data of 7 patients with PNECs proved by surgery and pathology in West China Hospital of Sichuan University from Jul. 2007 to Dec. 2012 were retrospectively analyzed. The boundary， density， and strengthening features of tumor were observed. Results Seven tumors were found in all patients with 2 in pancreatic head， body， and tail， respectively. There was 1 tumor in pancreatic body and tail too. Five tumors were with unclear boundary. Five tumors had hypodense enhancement and 2 had isodense enhancement. Two cases had distal pancreatic duct dilation. None of them had liver metastases or lymph node involvement. Conclusion PNEC has certain characteristics on imaging. It is difficult to distinguish diagnosis from pancreatic cancer.
ObjectiveTo explore the key genes and potential molecular mechanisms of liver and lymph node metastases relevant to duodenal neuroendocrine tumors (DNET). MethodsThe tissues of paracancerous duodenal epithelial, primary lesion, liver metastasis lesion, and lymph node metastasis lesion of a rare DNET accompanied by liver and lymph node metastases were sequenced and analyzed. The differentially expressed genes (DEGs) were screened for different tissues and the functional enrichment analysis was performed. ResultsThe tissues of paracancerous duodenal epithelial was used as the control, a total of 2 053 DEGs expressed only in the liver metastases lesion tissues and 742 DEGs expressed only in the lymph node metastases lesion tissues were screened out, and the top 5 genes expressed in the liver metastases lesion tissues were ORM1, C4BPA, AHSG, C9, and LBP, which in the lymph node metastases lesion tissues were ABHD12B, AC100850.1, HOXC9, AC083967.1, and HOXC8. Kyoto Encyclopedia of Genes and Genomes enrichment analysis found that the DEGs were mainly enriched in the phosphatidylinosiol 3 kinase / protein kinase B pathway, mitogen-activated protein kinase pathway, human papillomavirus infection, etc. ConclusionMultiple DEGs and pathways in metastatic lesions are found in this patient with DNET accompanied by liver metastasis and lymph node metastasis, which provides a new direction for treatment and prophylaxis of DNET.
ObjectiveTo summarize the status and progress of imaging studies of pancreatic neuroendocrine neoplasms (pNENs).MethodThe relevant literatures published recently at domestic and abroad about the imaging of pNENs were collected and reviewed.ResultsDue to poor visibility of pancreatic body and tail, the application of ultrasound (US) was limited. Compared with US, endoscopic ultrasound (EUS) and contrast-enhanced ultrasound (CEUS) could improve the detection rate of pNENs. The ability of plain CT scans to differentiate pathological grades was still controversial, but the value of enhanced scan was higher. CT texture analysis was feasible in the discrimination of nonhypervascular pNENs and pancreatic ductal adenocarcinoma (PDAC). Teta2 was the parameter with the highest diagnostic performance. The enhanced features of MRI were similar to CT. Combined with the apparent diffusion coefficient (ADC) value, the diagnostic and classification capabilities of MRI were improved, and the sensitivity and specificity of different ADC thresholds were also different. 68Ga-tetraazacyclododecane tetraacetic acid (68Ga-DOTA) peptide PET-CT had good preliminary diagnostic value for well-differentiated pNENs, and 18Fluoro-fluorodeoxyglucose (18F-FDG) PET-CT had limited diagnostic value.ConclusionsSomatostatin receptor imaging is of high diagnostic value and can guide clinical treatment and predict prognosis, but it has not been widely used in China. Conventional morphological images have advantages in the diagnosis and classification of pNENs. Therefore, it is important to choose a proper image inspection method.
Objective To summary the pathogenic site, clinical manifestations, endoscopic and radiographic features, pathologic characteristics, diagnosis, treatment, and prognosis of gastroenteropancreatic neuroendocrine neoplasm(GEP-NEN). Methods Clinical data of 70 cases of GEP-NEN who were treated in Nanjing Drum Tower Hospital from Jan. 2003 to Dec. 2012 were collected and retrospectively analyzed. Results Of the 70 cases, 35 cases(50.0%) were in pancreas, 18 cases(25.7%) were in rectum, 10 cases(14.3%) were in stomach, and 7 cases(10.0%) were in appendix; 55 cases(78.6%) were nonfunctional tumors, while 15 cases(21.4%) were functional; 50 cases(71.4%) were neuroendocrine tumor, 15 cases(21.4%) were neuroendocrine carcinoma, and 5 cases(7.2%) were mixed adenoendocrine carcinoma; 43 cases(61.4%) were in grade 1, 7 cases(10.0%) were in grade 2, and 20 cases(28.6%) were in grade 3 respectively. The detection rate of endoscopy, type-B ultrasonic, CT, and MRI were 90.0%(27/30), 67.9% (19/28), 86.0%(43/50), and 70.0%(7/10) respectively. A total of 67 patients(95.7%) were underwent surgery, including endoscopic resection, and 3 cases (4.3%) didn't receive surgery. Forty cases were followed-up for 6 months to 9 years(the median survival time was 3 years), and the 1-, 3-, and 5-year survival rates were 82.5%(33/40), 47.5%(19/40), and 35.0%(14/40) respectively. Conclusion GEP-NEN occurs mainly in pancreas, and the clinical manifestations are variable. Endoscopy and radiographic examination methods play an important role in diagnosis of GEP-NEN, but final diagnosis is mainly based on pathological detection. Surgery is the main treatment method for it.
ObjectiveTo investigate the value of laparoscopic liver venous deprivation (LLVD) in promoting the growth of contralateral future liver remnant (FLR) during two-step hepatectomy. MethodThe clinicopathologic data of a 45-year-old female patient with pancreatic neuroendocrine tumor with multiple liver metastases (grade G2) treated by two-step hepatectomy based on LLVD in January 2022 in the Sichuan Provincial People’s Hospital were analyzed retrospectively. ResultsThe liver function returned to normal within 10 d after LLVD, and the relative increase ratio of FLR reached to 98.35% on postoperative day 10. The laparoscopic right hemi-hepatectomy and distal pancreatectomy plus splenectomy was performed without any postoperative complications, and the patient was discharged from hospital on postoperative day 8. No tumor recurrence or metastasis occurred during the follow-up period. ConclusionsFrom the analysis results of this case, the LLVD could promote the growth of FLR safely and effectively. LLVD provides an alternative surgical method of two-step hepatectomy for treatment of benign and malignant liver tumors.