Upper level: s  BODY STRUCTURES

s2  The eye, ear and related structures

Lower livel:

• s210  Structure of eye socket

• s220  Structure of eyeball

• s230  Structures around eye

• s240  Structure of external ear

• s250  Structure of middle ear

• s260  Structure of inner ear

• s298  Eye, ear and related structures, other specified

• s299  Eye, ear and related structures, unspecified

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