This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Which of the following statements regarding carcinoid tumor is not true? 
Select and explain. 
A. On histopathology 4 distinctive forms are present, B. Extensive involvement of small intestine is associated with higher chance of lung involvement, C. 5 year survival for carcinoid tumors is > 60%, D. 80% of appendiceal carcinoids are accidently detected during surgery for other indications
A: On histopathology 4 distinctive forms are present
Answer: A: On histopathology 4 distinctive forms are present 
Explanation: On histopatholgy the carcinoid tumor may show 5 distinct patterns Solid,insular and nodular cords Trabecular pattern Tubules and glands/rosette like pattern Poorly differentiated pattern or atypical pattern Mixed pattern Note-Commonest feature of carcinoid is cutaneous flushing