Question:

Which of the following is false?
1. A posterior rectus sheath hernia is a rarely seen clinical entity.
2. The appearance of a posterior rectus sheath hernia on computed tomography is a defect in the posterior rectus sheath with protruding bowel.
3. A posterior rectus sheath hernia should be considered in patients with unexplained intermittent abdominal pain.
4. The diagnosis of posterior rectus sheath hernia is often made by plain radiographs.
5. The posterior rectus sheath usually is fully developed in the human fetus by 8-9 weeks.





Answer:

The correct answer for the question "Which of the following is false?" is:

4. The diagnosis of posterior rectus sheath hernia is often made by plain radiographs.



Explanation
1. A posterior rectus sheath hernia is a rarely seen clinical entity. [A posterior rectus sheath hernia is an extremely rare hernia of the anterior abdominal wall.]
2. The appearance of a posterior rectus sheath hernia on computed tomography is a defect in the posterior rectus sheath with protruding bowel. [CT shows a defect in the posterior rectus sheath with bowel protruding anteriorly and abutting the rectus musculature.]
3. A posterior rectus sheath hernia should be considered in patients with unexplained intermittent abdominal pain. [A posterior rectus sheath hernia is an uncommon but important diagnosis that can cause small bowel obstruction and should be considered in patients with unexplained intermittent abdominal pain.]
4. The diagnosis of posterior rectus sheath hernia is more often made by cross-sectional imaging. [Increased utilization of cross-sectional imaging, particularly CT, has dramatically improved diagnosis and subsequent management of patients with...abdominal wall hernias.]
5. The posterior rectus sheath usually is fully developed in the human fetus by 8-9 weeks. [The posterior rectus sheath develops from fascial laminae arising from the internal oblique and transversus abdominis muscles by 8-9 weeks.]



From the manuscript:
Posterior Rectus Sheath Hernia Causing Intermittent Small Bowel Obstruction
Radiology Case. 2014 Sep; 8(9):25-29


This article belongs to the GI section.




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From the manuscript

Posterior Rectus Sheath Hernia Causing Intermittent Small Bowel Obstruction

Free full text article: Posterior Rectus Sheath Hernia  Causing Intermittent Small Bowel Obstruction

Abstract
A posterior rectus sheath hernia is an abdominal wall hernia that is rarely encountered. Owing to its rarity, it can be easily overlooked in the setting of a patient presenting with abdominal pain. We report a case of a posterior rectus sheath hernia that caused intermittent small bowel obstruction. The unusual aspects of this case are that the defect was large, measuring 6 cm in the transverse diameter, and that it contained small bowel within a large portion of the rectus sheath. Because the defect was large and affected nearly the entire posterior rectus sheath, it was difficult to discern on computed tomography until a small bowel obstruction developed. In this case, a limited awareness of this clinical entity contributed to the delay in diagnosis.






References



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