CARD15 Gene and Crohn's Disease Relationship
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Questions and Answers

What is the most commonly applied definition of disease recurrence in the context of recurrent CD activity?

  • The variability in the severity of symptoms
  • The occurrence of radiologic and endoscopic tests
  • The need for reoperation
  • The development of symptoms related to recurrent CD activity (correct)

What is generally accepted as defining clinical recurrence in the context of recurrent CD activity?

  • CDAI greater than 150 (correct)
  • Variability in severity of symptoms
  • Onset of insidious symptoms
  • Reported crude recurrence rates

What is the clearest end point as a definition of recurrence in the context of recurrent CD activity?

  • Radiologic and endoscopic tests
  • Reported cumulative recurrence rates
  • The need for reoperation (correct)
  • Severe variability in symptoms

What percentage of patients experience symptomatic recurrence at 5 years in the context of recurrent CD activity?

<p>60% (A)</p> Signup and view all the answers

At what time frame can clinical recurrence occur in between 75% and 95% of cases in the context of recurrent CD activity?

<p>20 years (B)</p> Signup and view all the answers

What is the predominant characteristic of the stricturing pattern of Crohn's disease?

<p>Partial or complete intestinal obstruction (A)</p> Signup and view all the answers

Which type of pattern is characterized by the development of sinus tracts, fistulae, and abscesses?

<p>Perforating pattern (D)</p> Signup and view all the answers

What is the most likely outcome for strictures resulting from the stricturing pattern of Crohn's disease?

<p>Surgical intervention required (C)</p> Signup and view all the answers

What is a notable characteristic of the perforating pattern of Crohn's disease?

<p>Development of sinus tracts and fistulae (D)</p> Signup and view all the answers

What tends to be the determining factor for clinical presentation and therapeutic options in Crohn's disease?

<p>Predominant disease pattern (D)</p> Signup and view all the answers

What is the characteristic feature of the remission phase of Crohn's disease?

<p>Healing of the inflamed tissue (C)</p> Signup and view all the answers

Which histopathologic feature is typically seen in the active phase of Crohn's disease?

<p>Transmural inflammation (A)</p> Signup and view all the answers

What is a characteristic microscopic feature of Crohn's disease that is demonstrated in only 50% of resected specimens?

<p>Noncaseating granuloma (C)</p> Signup and view all the answers

Which factor has been associated with the development and exacerbation of Crohn's disease?

<p>Smoking (B)</p> Signup and view all the answers

Which infectious agent has NOT been consistently associated with Crohn's disease according to the text?

<p>Measles virus (A)</p> Signup and view all the answers

What is the characteristic feature of the inflammatory pattern of Crohn's disease?

<p>Adynamic segment of intestine and luminal narrowing (A)</p> Signup and view all the answers

Which symptom is most commonly associated with the obstructive pattern of Crohn's disease?

<p>Presence of a palpable mass in the right lower quadrant (D)</p> Signup and view all the answers

Which imaging study is considered the best means for assessing the small bowel for Crohn's disease?

<p>Small bowel follow­through or enteroclysis (A)</p> Signup and view all the answers

What is the primary manifestation that can be identified in the early stages of Crohn's disease?

<p>Mucosal granulations with ulceration and nodularity (B)</p> Signup and view all the answers

Which symptom is more likely to respond to medical therapy in Crohn's disease?

<p>Mucosal granulations with ulceration and nodularity (A)</p> Signup and view all the answers

Which of the following best describes the distribution of Crohn's disease (CD) within families?

<p>It shows no specific pattern of inheritance within families (D)</p> Signup and view all the answers

What is the current understanding of the etiology of Crohn's disease (CD)?

<p>It is a result of an unknown pathologic trigger inducing an overreaction in an otherwise normal immune system (A)</p> Signup and view all the answers

What has been demonstrated in both Crohn's disease (CD) patients and their symptom-free first-degree relatives?

<p>A specific primary defect in the systemic immune system (C)</p> Signup and view all the answers

What is the role of the CARD15/NOD2 gene in relation to Crohn's disease (CD)?

<p>It has been linked to susceptibility to CD (B)</p> Signup and view all the answers

What is the relationship between genetic predisposition and environmental triggers in the manifestation of Crohn's disease (CD)?

<p>Genetic predisposition may play a role, whereas environmental triggers may start the pathologic sequence leading to CD (C)</p> Signup and view all the answers

What is the genetic relationship of CARD15/NOD2 to Crohn's disease (CD)?

<p>Complex and poorly understood (C)</p> Signup and view all the answers

What characteristic histopathologic lesion is found in Crohn's disease specimens?

<p>Noncaseating granulomas (C)</p> Signup and view all the answers

Which infectious agent has been isolated from resected Crohn's disease specimens?

<p>Mycobacterium paratuberculosis (B)</p> Signup and view all the answers

What has been associated with the development of Crohn's disease?

<p>Smoking (D)</p> Signup and view all the answers

What role does diet modification play in Crohn's disease development according to the text?

<p>Can ameliorate the symptoms but not identified as a cause (A)</p> Signup and view all the answers

What is the most commonly affected location by Crohn disease?

<p>Terminal ileum (D)</p> Signup and view all the answers

What percentage of all patients with Crohn disease have more than one intestinal segment affected simultaneously?

<p>One-fifth (C)</p> Signup and view all the answers

Which regions have the highest incidence of Crohn disease?

<p>United States, Canada, and Europe (D)</p> Signup and view all the answers

What is the current estimated incidence of Crohn disease in the United States?

<p>4 new cases per year for every 100,000 persons (C)</p> Signup and view all the answers

In which age range is the peak age for contracting Crohn disease?

<p>15-25 years (C)</p> Signup and view all the answers

Which part of the gastrointestinal system is least commonly affected by Crohn disease?

<p>Mouth (B)</p> Signup and view all the answers

Where is Crohn disease much less common?

<p>Asia, South America, and Japan (D)</p> Signup and view all the answers
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