Question
What is the most common type of tumour of Vermiform Appendix?
| A. |
Epithelial tumour
|
| B. |
Carcinoid tumour
|
| C. |
Germ cell tumour
|
| D. |
Papillary cell tumour
|
Show Answer
|
Correct Answer » A
Explanation
|
|
The current WHO classification categorizes appendiceal tumors into epithelial and non-epithelial neoplasms.
- Epithelial tumors are now regarded as the most common category of appendiceal neoplasms.
- This group includes:
- Serrated lesions
- Mucinous neoplasms
- Adenomas
- Adenocarcinomas
- Neuroendocrine (carcinoid) tumors are classified separately and are the most common individual non-epithelial primary tumor of the appendix.
Why Other Options Are Incorrect
B. Neuroendocrine (Carcinoid) Tumor
- Incorrect because, under the current WHO classification, neuroendocrine tumors are a separate category.
- They were traditionally considered the most common appendiceal tumors in older textbooks.
C. Germ Cell Tumor
- Incorrect because germ cell tumors are extremely rare in the appendix and primarily arise in the gonads.
D. Mesenchymal Tumor
- Incorrect because mesenchymal tumors (e.g., GIST, leiomyoma) are uncommon in the appendix.
