With the exacerbation of aging population in China, the number of patients with Alzheimer's disease (AD) is increasing rapidly. AD is a chronic but irreversible neurodegenerative disease, which cannot be cured radically at present. In recent years, in order to intervene in the course of AD in advance, many researchers have explored how to detect AD as early as possible, which may be helpful for effective treatment of AD. Imaging genomics is a kind of diagnosis method developed in recent years, which combines the medical imaging and high-throughput genetic omics together. It studies changes in cognitive function in patients with AD by extracting effective information from high-throughput medical imaging data and genomic data, providing effective guidance for early detection and treatment of AD patients. In this paper, the association analysis of magnetic resonance image (MRI) with genetic variation are summarized, as well as the research progress on AD with this method. According to complexity, the objects in the association analysis are classified as candidate brain phenotype, candidate genetic variation, genome-wide genetic variation and whole brain voxel. Then we briefly describe the specific methods corresponding to phenotypic of the brain and genetic variation respectively. Finally, some unsolved problems such as phenotype selection and limited polymorphism of candidate genes are put forward.
ObjectiveTo explore the effect of laparoscopic hepatectomy in patients with complex hepatolithiasis.MethodsThe clinical data of 31 patients with complex hepatolithiasis treated by laparoscopic hepatectomy in our hospital from January 2015 to September 2019 were retrospectively analyzed, and the effect was followed up.ResultsTwo cases were converted to open surgery, and the remaining 29 cases successfully completed laparoscopic surgery. The operative time of 31 patients was 185–490 min (260±106) min; the intraoperative bleeding volume was 200–1 300 mL (491±225) mL; the time of hepatic blood flow occlusion was 20–45 min (29±18) min; the time of choledochoscopy was 10–50 min (28±15) min. The scope of hepatectomy includes: Ⅱ, Ⅲ, Ⅵ, and Ⅶ in 14 cases, Ⅰ, Ⅱ, Ⅲ,Ⅵ, and Ⅶ in 8 cases, Ⅱ, Ⅲ, Ⅳ, Ⅵ, and Ⅶ in 3 cases, Ⅳ, Ⅴ, and Ⅷ in 3 cases, Ⅱ, Ⅲ, Ⅴ, Ⅵ, Ⅶ, and Ⅷ in 2 cases, Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅵ, and Ⅶ in 1 case. The postoperative anal exhaust time was 24–73 h (41.8±15.2) h; postoperative feeding time was 14–23 h, median feeding time was 19 h; postoperative ambulation time was 15–46 h, median ambulation time was 27 h; postoperative drainage tube extraction time was 3–14 d, median drainage tube extraction time was 5 d; postoperative hospitalization time was 6–15 d, median postoperative hospitalization time was 9 d. Twenty-seven patients were followed up for 7 to 63 months, with a median follow-up time of 25 months. The incidence of complications was 19.4% (6/31), according to Claviein classification, there were 2 cases in grade Ⅰ (6.5%), 1 case in grade Ⅱ (3.2%), 3 cases in grade Ⅲa (9.7%).ConclusionLaparoscopic hepatectomy is safe and feasible for the treatment of complex hepatolithiasis, which is performed by a skilled hepatobiliary surgeon.