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KEY FACTS
Terminology
MR Imaging
Pathology
Clinical Issues
Diagnostic Checklist
TERMINOLOGY
Abbreviations
- Obstructed defecation (OBD)
Synonyms
- Outlet obstruction, OBD syndrome
Definitions
- OBD
- Disorder resulting in difficulty evacuating stool from rectum
- Characterized by frequent visits to toilet, sensation of incomplete emptying of bowels, often with straining to defecate
- Constipation
- Describes symptom, not clinical sign, particularly subjective, which means different things to different people, such as bowel frequency, ease of defecation, stool size/consistency
- Infrequent defecation
- Usually defined as < 3 bowel movements per week
- Frequently associated with slow-transit time; slow-transit constipation (STC)
- Usually defined as < 3 bowel movements per week
- Difficult evacuation
- Straining at stool is considered abnormal if it occurs for > 25% of time spent in lavatory
- OBD
MR Imaging
Technical Considerations
Abnormal Findings on Static MR Imaging
MR Defecography
Dynamic Cine MR During Maximum Straining
Correlation Between Dynamic & Static MR
Pathology
General Features
Gross Pathologic & Surgical Features
Microscopic Features
Clinical Issues
Presentation
Demographics
Natural History & Prognosis
Treatment
Diagnostic Checklist
Consider
Image Interpretation Pearls
Selected References
- Lalwani N et al: Imaging and clinical assessment of functional defecatory disorders with emphasis on defecography. Abdom Radiol (NY). 46(4):1323-33, 2021
- El Sayed RF: Integrated MR analytical approach and reporting of pelvic floor dysfunction: current implications and new horizons. Radiol Clin North Am. 58(2):305-27, 2020
- Sanchez MI et al: Epidemiology and burden of chronic constipation. Can J Gastroenterol. 25 Suppl B:11B-5B, 2011
- Belsey J et al: Systematic review: impact of constipation on quality of life in adults and children. Aliment Pharmacol Ther. 31(9):938-49, 2010
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References
Tables
Tables
KEY FACTS
Terminology
MR Imaging
Pathology
Clinical Issues
Diagnostic Checklist
TERMINOLOGY
Abbreviations
- Obstructed defecation (OBD)
Synonyms
- Outlet obstruction, OBD syndrome
Definitions
- OBD
- Disorder resulting in difficulty evacuating stool from rectum
- Characterized by frequent visits to toilet, sensation of incomplete emptying of bowels, often with straining to defecate
- Constipation
- Describes symptom, not clinical sign, particularly subjective, which means different things to different people, such as bowel frequency, ease of defecation, stool size/consistency
- Infrequent defecation
- Usually defined as < 3 bowel movements per week
- Frequently associated with slow-transit time; slow-transit constipation (STC)
- Usually defined as < 3 bowel movements per week
- Difficult evacuation
- Straining at stool is considered abnormal if it occurs for > 25% of time spent in lavatory
- OBD
MR Imaging
Technical Considerations
Abnormal Findings on Static MR Imaging
MR Defecography
Dynamic Cine MR During Maximum Straining
Correlation Between Dynamic & Static MR
Pathology
General Features
Gross Pathologic & Surgical Features
Microscopic Features
Clinical Issues
Presentation
Demographics
Natural History & Prognosis
Treatment
Diagnostic Checklist
Consider
Image Interpretation Pearls
Selected References
- Lalwani N et al: Imaging and clinical assessment of functional defecatory disorders with emphasis on defecography. Abdom Radiol (NY). 46(4):1323-33, 2021
- El Sayed RF: Integrated MR analytical approach and reporting of pelvic floor dysfunction: current implications and new horizons. Radiol Clin North Am. 58(2):305-27, 2020
- Sanchez MI et al: Epidemiology and burden of chronic constipation. Can J Gastroenterol. 25 Suppl B:11B-5B, 2011
- Belsey J et al: Systematic review: impact of constipation on quality of life in adults and children. Aliment Pharmacol Ther. 31(9):938-49, 2010
