Chordoma is a rare type of cancer. Understanding its origin is crucial in pathology. Let's explore the options:
Pharyngeal bursa: This is a depression in the nasopharynx, part of the anatomy related to the digestive and respiratory systems. Chordoma does not originate from the pharyngeal bursa.
Notochord: This embryological structure is pivotal in chordoma development. During embryonic development, the notochord serves as a scaffolding for vertebral column formation. Remnants of the notochord can give rise to chordomas, making this the correct answer.
Rathke’s pouch: This structure is an invagination of ectoderm that gives rise to the anterior pituitary gland. It is not related to chordomas.
Luschka's bursa: This is a facial bursa, unrelated to chordomas, primarily involved in the cushioning of movement in facial structures.
Thus, the correct answer is that chordoma arises from the notochord.