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Annual International Conference of the... Jul 2023The primary function of the duodenum is to undertake chemical digestion by ensuring that the partially digested food received from the stomach is well-mixed with the...
The primary function of the duodenum is to undertake chemical digestion by ensuring that the partially digested food received from the stomach is well-mixed with the enzymes and chemicals secreted into it. However, little is known about the anatomical variations in the shape of the duodenum within humans, and thus the effect of duodenum shape on the flow and mixing occurring within the lumen has not been studied. In this work, a methodology for analyzing shape variations in the normal duodenal anatomy has been developed and applied to a publicly available dataset of abdominal CT images. This method does not require the placement of landmarks as it is based on the underlying tubular 'C' shape of the duodenum. The average duodenal length and radius of this dataset (consisting of 34 subjects) were 212.8 ± 38 mm and 10.8 ± 2.5 mm respectively. A Principal Component Analysis (PCA) was conducted on a sample of 34 duodenums after normalizing their lengths and the first five principal components were found to contribute to 82 % of the total variation. The first shape component (accounting for 42 % of overall variation) consisted of variations in the radius along the duodenum with no deformations normal to the central plane, and the subsequent shape modes consisted of twists in the centerline either in and out of the central plane, and radial variations at either the inlet or outlet. This is the first study to analyze shape variations in the human duodenum and the results can be combined with flow modeling to analyze the effect of shape on the flow and mixing occurring within the duodenum.Clinical relevance- The methods developed in this study can be used by clinicians to diagnose abnormalities in an individual's duodenum shape.
Topics: Humans; Duodenum; Stomach
PubMed: 38083606
DOI: 10.1109/EMBC40787.2023.10340464 -
Nagoya Journal of Medical Science Nov 2023Endoscopic papillectomy is widely performed to treat duodenal papillary tumors, particularly at high-volume centers. It is indicated for adenomas without intraductal... (Review)
Review
Endoscopic papillectomy is widely performed to treat duodenal papillary tumors, particularly at high-volume centers. It is indicated for adenomas without intraductal extension of the bile or pancreatic ducts. However, despite numerous reports of carcinomas that expand the indications to include well-differentiated adenocarcinomas that do not invade the sphincter of Oddi, the low agreement between biopsy and final pathological diagnosis, as well as the current inability of imaging modalities to diagnose sphincter of Oddi invasion, makes it difficult to consider expanding indications. Although complications can be prevented by certain methods, such as pancreatic duct stenting, and the frequency of severe complications has decreased, the safety of the procedure remains unconfirmed. In the future, this technology is expected to progress and enable wider applications, including those in tumors with extensive horizontal spread and those with intraductal extension of the bile and pancreatic ducts. Such technology may also improve the safety and accuracy of diagnosis.
Topics: Humans; Ampulla of Vater; Endoscopy; Pancreatic Ducts; Biopsy; Adenocarcinoma; Treatment Outcome
PubMed: 38155621
DOI: 10.18999/nagjms.85.4.648 -
Digestive and Liver Disease : Official... Jul 2023
Topics: Humans; Ampulla of Vater; Duodenoscopy
PubMed: 37127495
DOI: 10.1016/j.dld.2023.04.016 -
Human Genetics Aug 2023Leveraging genome-wide association statistics generated from a large study of amyotrophic lateral sclerosis (ALS; 29,612 cases and 122,656 controls) and UK Biobank (UKB;...
Leveraging genome-wide association statistics generated from a large study of amyotrophic lateral sclerosis (ALS; 29,612 cases and 122,656 controls) and UK Biobank (UKB; 4,024 phenotypes, up to 361,194 participants), we conducted a phenome-wide analysis of ALS genetic liability and identified 46 genetically correlated traits, such as fluid intelligence score (r = - 0.21, p = 1.74 × 10), "spending time in pub or social club" (r = 0.24, p = 2.77 × 10), non-work related walking (r = - 0.25, p = 1.95 × 10), college education (r = - 0.15, p = 7.08 × 10), "ever diagnosed with panic attacks (r = 0.39, p = 4.24 × 10), and "self-reported other gastritis including duodenitis" (r = 0.28, p = 1.4 × 10). To assess the putative directionality of these genetic correlations, we conducted a latent causal variable analysis, identifying significant genetic causality proportions (gĉp) linking ALS genetic liability to seven traits. While the genetic component of "self-reported other gastritis including duodenitis" showed a causal effect on ALS (gĉp = 0.50, p = 1.26 × 10), the genetic liability to ALS is potentially causal for multiple traits, also including an effect on "ever being diagnosed with panic attacks" (gĉp = 0.79, p = 5.011 × 10) and inverse effects on "other leisure/social group activities" (gĉp = 0.66, p = 1 × 10) and prospective memory result (gĉp = 0.35, p = 0.005). Our subsequent Mendelian randomization analysis indicated that some of these associations may be due to bidirectional effects. In conclusion, this phenome-wide investigation of ALS polygenic architecture highlights the widespread pleiotropy linking this disorder with several health domains.
Topics: Humans; Amyotrophic Lateral Sclerosis; Genome-Wide Association Study; Duodenitis; Phenotype; Gastritis; Mendelian Randomization Analysis
PubMed: 36773064
DOI: 10.1007/s00439-023-02525-5 -
Biomaterials Nov 2023Duodenal ablation improves glycaemic control and weight loss, so it has been applied using hydrothermal catheters in obese and type 2 diabetes patients, indicating...
Duodenal ablation improves glycaemic control and weight loss, so it has been applied using hydrothermal catheters in obese and type 2 diabetes patients, indicating similar mechanisms and therapeutic effects as bariatric surgeries. Endoscopic photodynamic therapy is an innovative procedure that easily accessible to endocrine or gastrointestinal organs, so it is critical for the sprayed photosensitizer (PS) to long-term interact with target tissues for enhancing its effects. Surfactant-like PS was more stable in a wide range of pH and 2.8-fold more retained in the duodenum at 1 h than hydrophilic PS due to its amphiphilic property. Endoscopic duodenal ablation using surfactant-like PS was performed in high fat diet induced rat models, demonstrating body weight loss, enhanced insulin sensitivity, and modulation of incretin hormones. Locoregional ablation of duodenum could affect the profiles of overall intestinal cells secreting meal-stimulated hormones and further the systemic glucose and lipid metabolism, regarding gut-brain axis. Our strategy suggests a potential for a treatment of minimally invasive bariatric and metabolic therapy if accompanied by detailed clinical trials.
Topics: Humans; Animals; Rats; Diabetes Mellitus, Type 2; Incretins; Photosensitizing Agents; Surface-Active Agents; Obesity; Duodenum; Blood Glucose
PubMed: 37778055
DOI: 10.1016/j.biomaterials.2023.122336 -
Digestive Diseases and Sciences Oct 2023
Topics: Humans; Duodenum; Gastrointestinal Diseases; Atrophy; Intestinal Mucosa; Celiac Disease
PubMed: 37603203
DOI: 10.1007/s10620-023-08074-1 -
Digestive and Liver Disease : Official... Jun 2024
Topics: Humans; Celiac Disease; Biopsy; Duodenum
PubMed: 38616138
DOI: 10.1016/j.dld.2024.03.018 -
Journal of Gastrointestinal Surgery :... Nov 2023Sphincter of Oddi dysfunction is a challenging and rare clinical entity resulting in pancreatobiliary pain and stasis of bile and pancreatic juice. This problem was...
BACKGROUND
Sphincter of Oddi dysfunction is a challenging and rare clinical entity resulting in pancreatobiliary pain and stasis of bile and pancreatic juice. This problem was classically treated with surgical therapy, but as classification of the disease has changed and newer methods of endoscopic evaluation and therapy have evolved, operative transduodenal sphincteroplasty is now generally reserved as a final therapeutic option for these patients. In this video and manuscript, we describe our approach to operative transduodenal sphincteroplasty in a patient with type I Sphincter of Oddi dysfunction.
METHODS
A 50-year-old female with history of Roux-en-Y gastric bypass presented with episodic right-upper-quadrant and epigastric abdominal pain with associated documented elevations in liver chemistries. Preoperative cross-sectional imaging demonstrated dilation of her common bile duct. After multidisciplinary discussion, the decision was made to pursue operative transduodenal sphincteroplasty.
RESULTS
All key operative steps of the transduodenal sphincteroplasty are demonstrated in the embedded video. Key operative steps include laparotomy, generous Kocher maneuver, and duodenotomy over the ampulla, allowing access for sequential biliary and pancreatic sphincterotomies and sphincteroplasties with absorbable suture. The duodenotomy and abdominal fascia are then closed. Our patient underwent sequential diet advancement and was discharged to home on postoperative day five. At clinic follow-up, pancreatobiliary-type pain had resolved.
CONCLUSION
The embedded video demonstrates a case of operative transduodenal sphincteroplasty, which can provide durable results in appropriate patient populations.
Topics: Humans; Female; Middle Aged; Sphincterotomy, Transduodenal; Sphincter of Oddi; Sphincter of Oddi Dysfunction; Common Bile Duct; Pain; Ampulla of Vater
PubMed: 37787871
DOI: 10.1007/s11605-023-05842-2 -
Arab Journal of Gastroenterology : the... Feb 2024Brunner's gland hamartoma (BGH) is a rare, benign tumor of the duodenum. It is mostly asymptomatic and usually found incidentally on routine esophagogastroduodenoscopy... (Review)
Review
Brunner's gland hamartoma (BGH) is a rare, benign tumor of the duodenum. It is mostly asymptomatic and usually found incidentally on routine esophagogastroduodenoscopy (EGD). However, some BGHs present with major complications including anemia, bleeding, obstruction, or dysplasia, requiring management and resection of these lesions. Herein, we present two cases of large BGHs of the duodenum, one presenting as severe gastrointestinal bleeding and the other, noted on EGD for iron deficiency anemia, found to have high grade dysplasia. This literature review discusses the rare serious complications of BGH, including iron deficiency anemia, overt gastrointestinal bleeding, and malignant potential.
Topics: Humans; Brunner Glands; Duodenal Diseases; Anemia, Iron-Deficiency; Hamartoma; Gastrointestinal Hemorrhage
PubMed: 38296695
DOI: 10.1016/j.ajg.2023.12.003 -
American Journal of Veterinary Research Sep 2023The objectives of this study were to quantify lymphocytes and eosinophils in the mucosa of the duodenum and rectum in asthmatic horses.
OBJECTIVE
The objectives of this study were to quantify lymphocytes and eosinophils in the mucosa of the duodenum and rectum in asthmatic horses.
ANIMALS
8 healthy and 10 asthmatic horses.
PROCEDURES
Asthmatic horses were evaluated in a symptomatic (after 6 weeks of exposure to moldy hay) and asymptomatic status (3 and 7 months after being fed alfalfa pellets [n = 4] or treated with inhaled fluticasone [6]). Duodenal and rectal biopsies were endoscopically (n = 4 to 6) taken in each horse. Eosinophils were counted on slides stained with hematoxylin, eosin, phloxine, and saffron, and immunohistochemistry was used to evaluate T and B lymphocytes using CD3 and CD20, respectively.
RESULTS
The duodenal and rectal epithelium of asthmatic and control horses contained exclusively T lymphocytes (CD3). Symptomatic asthmatic horses, compared to controls, had a significantly higher number of T lymphocytes (CD3) in the duodenal epithelium (P = .016) and the adjacent lamina propria of the villi (P = .04). Compared to symptomatic asthmatic horses, the fluticasone-treated group had significantly fewer T lymphocytes in the total lamina propria of the rectal mucosa (P < .01).
CLINICAL RELEVANCE
Taken together, these results suggest that asthmatic horses have greater infiltration of T lymphocytes in the duodenal and rectal mucosa, indicating a certain degree of inflammation, which could be due to a systemic inflammatory effect and/or a local effect of ingested hay allergens in asthmatic horses. Systemic markers of inflammation have not been investigated to better qualify if the infiltration noted is due to a local and/or systemic effect.
Topics: Horses; Animals; T-Lymphocytes; Rectum; Duodenum; Lymphocytes; Asthma; Intestinal Mucosa; Inflammation; Fluticasone; Horse Diseases
PubMed: 37532235
DOI: 10.2460/ajvr.23.04.0083