13 Questions
When is resection indicated for hemorrhoids?
Only for refractory symptoms
What is the role of hemorrhoids in the body?
Maintaining continence
Where do up to 25% of neuroendocrine tumors occur?
Rectum
What factor determines the sensitivity of GISTs (gastrointestinal stromal tumors) to tyrosine kinase inhibitors (TKIs)?
Expression of CD117 (KIT)
What are the common features of well-differentiated neuroendocrine tumors (carcinoid tumors) when identified on colonoscopy?
Small size
What are the clinical manifestations of larger GISTs (gastrointestinal stromal tumors)?
Bleeding, obstruction, or abdominal pain
What is the treatment of choice for tumors occurring in the retrorectal space?
Surgical resection with microscopically negative margins
Which type of lesions constitute the majority of congenital lesions in the retrorectal space?
Developmental cysts
What is the most common malignant tumor in the retrorectal space?
Chordomas
Which type of lesion often contains tissue from each germ cell layer and may have both cystic and solid components?
Teratomas
What is the pathognomonic radiographic appearance of anterior meningocele and myelomeningocele?
Scimitar sign
Which type of lesions are more likely to be malignant than cystic lesions in the retrorectal space?
Solid lesions
For which condition is surgical resection (local excision or radical resection) with microscopically negative margins the preferred treatment?
Retrorectal tumors
Test your knowledge of hemorrhoids, fistula in ano, embryology, anatomy, normal physiology, clinical evaluation, and general surgical considerations. Assess your understanding of the treatment and resection of hemorrhoids, as well as the factors influencing the treatment of fistula in ano.
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