GI Radiology > Appendix > Quiz Answers

Appendix Quiz Answers

1.  The most common type of appendiceal neoplasm are mucinous epithelial neoplasms.


FALSE: the most common tumor type, by far, is carcinoid tumors, representing up to 80% of appendiceal neoplasms

2.  Ultrasound is preferred over CT for the diagnosis of appendicitis in which of the following patient populations:

A. Elderly females with heart problems
B. Pregnant females
C. A person recovering from a recent CVA

B: Ultrasound is preferred over CT in pregnant females and young children as it will not expose them to ionizing radiation or IV contrast. If ultrasound is negative or equivocal in these patients, then CT is advisable.

3.  The following image demonstrates a complication seen most often due to:

A. Appendicitis with a ruptured appendix
B. Metastatic carcinoid tumor
C. Metastatic mucinous adenocarcinoma

C: The image is an example of pseudomyxoma peritonei, most often secondary to metastatic mucinous adenocarcinoma. The key in this image is to recognize that the mass effect exerted on the small intestines by the gelatinous matrix of pseudomyxoma peritonei.

4.  All appendiceal neoplasms are most commonly found in middle aged to elderly people


FALSE: Carcinoid tumors typically tend to present in younger patients

5.  What are the dimensions of the normal appendix as seen on ultrasound:

A. 7 cm x 2 cm
B. 7 mm x 2 mm
C. 7 in x 2 in
D. None of the above

D: The normal appendix cannot be visualized on ultrasound

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