Narrow nasal ridge Pinched nose Thin dorsum of nose Thin nasal dorsum This feature may be accompanied by narrow nasal bridge and narrow nasal base, which should be coded separately. HP:0000418 Narrow nasal dorsum Decreased width of nasal ridge Decreased width of dorsum of nose Narrow dorsum of nose Narrow nasal ridge UMLS:C1837761 Decreased width of nasal dorsum Thin nasal ridge Decreased width of the nasal ridge. Abnormal nasal dorsum morphology