Multiple Choice
A 23-year-old man comes to the office with a 2-week history of malaise, loss of appetite, and vague abdominal pain. The patient has had no nausea, vomiting, changes in his bowel habits, dysuria, urinary frequency, or hematuria. He had an appendectomy for acute appendicitis at age 15; his medical history is otherwise unremarkable. He does not use tobacco or alcohol and has had no recent travel. His father was diagnosed with colon cancer at age 60. Physical examination reveals normal bowel sounds and no guarding or rebound tenderness. Abdominal CT scan obtained as part of this patient's evaluation is shown in the image below. 
The anatomical structure indicated by the arrow originates from which of the following embryologic divisions?
A) Ectoderm
B) Endoderm
C) Mesoderm
D) Neural crest
E) Notochord
Correct Answer:
Verified
Correct Answer:
Verified
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