The posterior nasal cavity-nasopharynx junction.
Smooth appearance without obvious lymphoid tissue.
Mild lymphoid hyperplasia involving roof and torus tubarius bilaterally.
Corrugated/rugae appearance of posterior nasopharyngeal wall.
Another undulated/wavy appearance of nasopharyngeal mucosa.
Rounded rectangle - favourite site of epistaxis in uncontrolled hypertension. (IT - tail of inferior turbinate, TT - torus tubarius, V - vomer, N - posterior nasopharyngeal wall, SP - rostral surface of soft palate, arrow - Eustachian tube opening)
This is a groove located behind torus tubarius or salpingopharyngeal fold on either side of nasopharynx (ellipse). Nasopharyngeal carcinoma (NPC) formation begins here with fullness, groove obliteration, and eventually becomes obvious tumour with or without ulceration.
[Arrow points to nasopharyngeal Eustachian tube opening]
Close-up view of left nasopharyngeal Eustachian tube opening in a patient irradiated for nasopharyngeal carcinoma. (N - posterior wall of nasopharynx, X - visible cartilage of Eustachian tube opening, arrow -direction leading to middle ear). Compare it with normal below.