Related Experiment Video
Updated: Jan 30, 2026

Author Spotlight: Investigating Immune Cell Dynamics in the Tumor Microenvironment — Challenges and Innovations in Cancer Prognosis
Published on: April 12, 2024
Long-Term Prognosis of Patients with Obscure Gastrointestinal Bleeding: A Retrospective Cohort Study
Makoto Arai1, Tomoaki Matsumura2, Yuki Ohta2
1Department of Clinical Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan, araim-cib@umin.ac.jp.
Insights
Patients with obscure gastrointestinal bleeding (OGIB) have a poor long-term prognosis, particularly the elderly and those with liver cirrhosis. Capsule endoscopy (CE) is a key diagnostic tool for OGIB.
Area of Science:
- Gastroenterology
- Internal Medicine
- Medical Prognosis
Background:
- Obscure gastrointestinal bleeding (OGIB) presents diagnostic challenges.
- Capsule endoscopy (CE) is a valuable tool for investigating OGIB.
- Long-term outcomes for OGIB patients require further elucidation.
Purpose of the Study:
- To evaluate the long-term prognosis of patients diagnosed with OGIB via capsule endoscopy (CE).
- To identify prognostic factors influencing survival in OGIB patients.
Main Methods:
- A cohort of 259 OGIB patients undergoing CE between 2007-2012 were followed.
- Clinical characteristics, including age, bleeding type, and comorbidities, were recorded.
- Survival data was collected from medical institutions for over 5 years post-CE.
Main Results:
- Of 240 analyzed patients, 57 (23.8%) died within the follow-up period.
- Five-year survival rate was 74.7%.
- Advanced age (≥65 years) and liver cirrhosis were significant predictors of poor prognosis.
Conclusions:
- Obscure gastrointestinal bleeding (OGIB) is associated with a significant mortality risk.
- Elderly patients and those with liver cirrhosis face a particularly poor prognosis.
- Capsule endoscopy aids in diagnosing OGIB and assessing patient risk stratification.
Aims:
We evaluated the long-term prognosis of patients with obscure gastrointestinal bleeding (OGIB) who underwent capsule endoscopy (CE).
Methods:
In our hospital, 429 patients underwent CE between November 2007 and March 2012. Among them, 259 patients underwent CE as the first examination for OGIB and were then followed at 77 clinics and hospitals. The clinical characteristics were investigated, including age, gender, overt/occult bleeding, the use of antithrombotic drugs and NSAIDs, complications (liver cirrhosis and hemodialysis), and CE. We asked the medical institutions for their survival data as of August 2017 (> 5 years after CE).
Results:
The prognoses of 240 patients (92.6%) were analyzed. The average follow-up period was 55.7 (1-115) months. During the follow-up period, 57 patients (23.8%) died and the survival rates were 90.5% at 1 year, 81.7% at 3 years, and 74.7% at 5 years. Age 65 years or older and liver cirrhosis were predictive factors for a poor prognosis. Rebleeding occurred in 42 patients (17.9%) and small bowel cancer and gastrointestinal stromal tumor were found at 12 and 21 months after CE, respectively.
Conclusions:
Patients with OGIB showed a poor prognosis, especially those who were elderly or who had liver cirrhosis.
More Related Videos
03:47A Retrospective Study on Endoscopic Surgery for the Treatment of Paravertebral Abscess in Spinal Tuberculosis Patients
Published on: October 25, 2024
03:05Influence of Emotional Factors on the Efficacy of Acupuncture Treatment for Overweight Complicated with Hyperlipidemia: A Retrospective Cohort Study
Published on: November 21, 2025
Related Concept Videos
Bleeding in Fresh Concrete
Bleeding can cause several issues in the concrete structure. Sometimes, the rising water gets trapped beneath large aggregate...
Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and...
Anatomy of the Gastrointestinal System
Here's a detailed walkthrough of this complex system:
Long-term Depression
Gastrointestinal Motility Disorders
Histology of the Gastrointestinal (GI) Tract
The mucosa is sometimes called a mucous membrane due to its mucus-secreting features. This membrane is composed of epithelium, which directly interacts with ingested substances, and the lamina propria, a layer...