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. 2021 Jun 5;74(Suppl 2):1527–1531. doi: 10.1007/s12070-021-02639-0

Table 2.

Endoscopic adenoid grade among patients as per Clemens classifications

Adenoid grade Description N %
Grade I Adenoid tissue filling 1/3 of the vertical portion of the choanae 0 0
Grade II Adenoid tissue filling 1/3–2/3 of the choanae 5 8.8
Grade III Filling 2/3 to nearly complete obstruction of Choanae 27 47.4
Grade IV Complete choanal obstruction 25 43.9