Diseases of middle ear and mastoid (H65-H75)

Diseases of the ear and mastoid process
- Diseases of middle ear and mastoid (H65-H75)
  - - H65 - Nonsuppurative otitis media
    - H65.0 - Acute serous otitis media
    - H65.00 - Acute serous otitis media, unspecified ear
    - H65.01 - Acute serous otitis media, right ear
    - H65.02 - Acute serous otitis media, left ear
    - H65.03 - Acute serous otitis media, bilateral
    - H65.04 - Acute serous otitis media, recurrent, right ear
    - H65.05 - Acute serous otitis media, recurrent, left ear
    - H65.06 - Acute serous otitis media, recurrent, bilateral
    - H65.07 - Acute serous otitis media, recurrent, unspecified ear
    - H65.1 - Other acute nonsuppurative otitis media
    - H65.11 - Acute and subacute allergic otitis media (mucoid) (serous)
    - H65.111 - Acute and subacute allergic otitis media (serous), r ear
    - H65.112 - Acute and subacute allergic otitis media (serous), left ear
    - H65.113 - Acute and subacute allergic otitis media (serous), bi
    - H65.114 - Acute and subacute allergic otitis media, recur, r ear
    - H65.115 - Acute and subacute allergic otitis media, recur, left ear
    - H65.116 - Acute and subacute allergic otitis media (serous), recur, bi
    - H65.117 - Acute and subacute allergic otitis media, recur, unsp ear
    - H65.119 - Acute and subacute allergic otitis media (serous), unsp ear
    - H65.19 - Other acute nonsuppurative otitis media
    - H65.191 - Other acute nonsuppurative otitis media, right ear
    - H65.192 - Other acute nonsuppurative otitis media, left ear
    - H65.193 - Other acute nonsuppurative otitis media, bilateral
    - H65.194 - Oth acute nonsuppurative otitis media, recurrent, right ear
    - H65.195 - Other acute nonsuppurative otitis media, recurrent, left ear
    - H65.196 - Oth acute nonsuppurative otitis media, recurrent, bilateral
    - H65.197 - Other acute nonsuppurative otitis media recurrent, unsp ear
    - H65.199 - Other acute nonsuppurative otitis media, unspecified ear
    - H65.2 - Chronic serous otitis media
    - H65.20 - Chronic serous otitis media, unspecified ear
    - H65.21 - Chronic serous otitis media, right ear
    - H65.22 - Chronic serous otitis media, left ear
    - H65.23 - Chronic serous otitis media, bilateral
    - H65.3 - Chronic mucoid otitis media
    - H65.30 - Chronic mucoid otitis media, unspecified ear
    - H65.31 - Chronic mucoid otitis media, right ear
    - H65.32 - Chronic mucoid otitis media, left ear
    - H65.33 - Chronic mucoid otitis media, bilateral
    - H65.4 - Other chronic nonsuppurative otitis media
    - H65.41 - Chronic allergic otitis media
    - H65.411 - Chronic allergic otitis media, right ear
    - H65.412 - Chronic allergic otitis media, left ear
    - H65.413 - Chronic allergic otitis media, bilateral
    - H65.419 - Chronic allergic otitis media, unspecified ear
    - H65.49 - Other chronic nonsuppurative otitis media
    - H65.491 - Other chronic nonsuppurative otitis media, right ear
    - H65.492 - Other chronic nonsuppurative otitis media, left ear
    - H65.493 - Other chronic nonsuppurative otitis media, bilateral
    - H65.499 - Other chronic nonsuppurative otitis media, unspecified ear
    - H65.9 - Unspecified nonsuppurative otitis media
    - H65.90 - Unspecified nonsuppurative otitis media, unspecified ear
    - H65.91 - Unspecified nonsuppurative otitis media, right ear
    - H65.92 - Unspecified nonsuppurative otitis media, left ear
    - H65.93 - Unspecified nonsuppurative otitis media, bilateral
  - - H66 - Suppurative and unspecified otitis media
    - H66.0 - Acute suppurative otitis media
    - H66.00 - Acute suppurative otitis media w/o spontaneous rupt ear drum
    - H66.001 - Acute suppr otitis media w/o spon rupt ear drum, right ear
    - H66.002 - Acute suppr otitis media w/o spon rupt ear drum, left ear
    - H66.003 - Acute suppr otitis media w/o spon rupt ear drum, bilateral
    - H66.004 - Ac suppr otitis media w/o spon rupt ear drum, recur, r ear
    - H66.005 - Ac suppr otitis media w/o spon rupt ear drum, recur, l ear
    - H66.006 - Acute suppr otitis media w/o spon rupt ear drum, recur, bi
    - H66.007 - Ac suppr otitis media w/o spon rupt ear drum,recur, unsp ear
    - H66.009 - Acute suppr otitis media w/o spon rupt ear drum, unsp ear
    - H66.01 - Acute suppurative otitis media w spontaneous rupt ear drum
    - H66.011 - Acute suppr otitis media w spon rupt ear drum, right ear
    - H66.012 - Acute suppr otitis media w spon rupt ear drum, left ear
    - H66.013 - Acute suppr otitis media w spon rupt ear drum, bilateral
    - H66.014 - Acute suppr otitis media w spon rupt ear drum, recur, r ear
    - H66.015 - Acute suppr otitis media w spon rupt ear drum, recur, l ear
    - H66.016 - Acute suppr otitis media w spon rupt ear drum, recurrent, bi
    - H66.017 - Ac suppr otitis media w spon rupt ear drum, recur, unsp ear
    - H66.019 - Acute suppr otitis media w spon rupt ear drum, unsp ear
    - H66.1 - Chronic tubotympanic suppurative otitis media
    - H66.10 - Chronic tubotympanic suppurative otitis media, unspecified
    - H66.11 - Chronic tubotympanic suppurative otitis media, right ear
    - H66.12 - Chronic tubotympanic suppurative otitis media, left ear
    - H66.13 - Chronic tubotympanic suppurative otitis media, bilateral
    - H66.2 - Chronic atticoantral suppurative otitis media
    - H66.20 - Chronic atticoantral suppurative otitis media, unsp ear
    - H66.21 - Chronic atticoantral suppurative otitis media, right ear
    - H66.22 - Chronic atticoantral suppurative otitis media, left ear
    - H66.23 - Chronic atticoantral suppurative otitis media, bilateral
    - H66.3 - Other chronic suppurative otitis media
    - H66.3X - Other chronic suppurative otitis media
    - H66.3X1 - Other chronic suppurative otitis media, right ear
    - H66.3X2 - Other chronic suppurative otitis media, left ear
    - H66.3X3 - Other chronic suppurative otitis media, bilateral
    - H66.3X9 - Other chronic suppurative otitis media, unspecified ear
    - H66.4 - Suppurative otitis media, unspecified
    - H66.40 - Suppurative otitis media, unspecified, unspecified ear
    - H66.41 - Suppurative otitis media, unspecified, right ear
    - H66.42 - Suppurative otitis media, unspecified, left ear
    - H66.43 - Suppurative otitis media, unspecified, bilateral
    - H66.9 - Otitis media, unspecified
    - H66.90 - Otitis media, unspecified, unspecified ear
    - H66.91 - Otitis media, unspecified, right ear
    - H66.92 - Otitis media, unspecified, left ear
    - H66.93 - Otitis media, unspecified, bilateral
  - - H67 - Otitis media in diseases classified elsewhere
    - H67.1 - Otitis media in diseases classified elsewhere, right ear
    - H67.2 - Otitis media in diseases classified elsewhere, left ear
    - H67.3 - Otitis media in diseases classified elsewhere, bilateral
    - H67.9 - Otitis media in diseases classified elsewhere, unsp ear
  - - H68 - Eustachian salpingitis and obstruction
    - H68.0 - Eustachian salpingitis
    - H68.00 - Unspecified Eustachian salpingitis
    - H68.001 - Unspecified Eustachian salpingitis, right ear
    - H68.002 - Unspecified Eustachian salpingitis, left ear
    - H68.003 - Unspecified Eustachian salpingitis, bilateral
    - H68.009 - Unspecified Eustachian salpingitis, unspecified ear
    - H68.01 - Acute Eustachian salpingitis
    - H68.011 - Acute Eustachian salpingitis, right ear
    - H68.012 - Acute Eustachian salpingitis, left ear
    - H68.013 - Acute Eustachian salpingitis, bilateral
    - H68.019 - Acute Eustachian salpingitis, unspecified ear
    - H68.02 - Chronic Eustachian salpingitis
    - H68.021 - Chronic Eustachian salpingitis, right ear
    - H68.022 - Chronic Eustachian salpingitis, left ear
    - H68.023 - Chronic Eustachian salpingitis, bilateral
    - H68.029 - Chronic Eustachian salpingitis, unspecified ear
    - H68.1 - Obstruction of Eustachian tube
    - H68.10 - Unspecified obstruction of Eustachian tube
    - H68.101 - Unspecified obstruction of Eustachian tube, right ear
    - H68.102 - Unspecified obstruction of Eustachian tube, left ear
    - H68.103 - Unspecified obstruction of Eustachian tube, bilateral
    - H68.109 - Unspecified obstruction of Eustachian tube, unspecified ear
    - H68.11 - Osseous obstruction of Eustachian tube
    - H68.111 - Osseous obstruction of Eustachian tube, right ear
    - H68.112 - Osseous obstruction of Eustachian tube, left ear
    - H68.113 - Osseous obstruction of Eustachian tube, bilateral
    - H68.119 - Osseous obstruction of Eustachian tube, unspecified ear
    - H68.12 - Intrinsic cartilagenous obstruction of Eustachian tube
    - H68.121 - Intrinsic cartilagenous obst of eustach tube, right ear
    - H68.122 - Intrinsic cartilagenous obst of eustach tube, left ear
    - H68.123 - Intrinsic cartilagenous obst of eustach tube, bilateral
    - H68.129 - Intrinsic cartilagenous obst of eustach tube, unsp ear
    - H68.13 - Extrinsic cartilagenous obstruction of Eustachian tube
    - H68.131 - Extrinsic cartilagenous obst of eustach tube, right ear
    - H68.132 - Extrinsic cartilagenous obst of eustach tube, left ear
    - H68.133 - Extrinsic cartilagenous obst of eustach tube, bilateral
    - H68.139 - Extrinsic cartilagenous obst of eustach tube, unsp ear
  - - H69 - Other and unspecified disorders of Eustachian tube
    - H69.0 - Patulous Eustachian tube
    - H69.00 - Patulous Eustachian tube, unspecified ear
    - H69.01 - Patulous Eustachian tube, right ear
    - H69.02 - Patulous Eustachian tube, left ear
    - H69.03 - Patulous Eustachian tube, bilateral
    - H69.8 - Other specified disorders of Eustachian tube
    - H69.80 - Oth disrd of Eustachian tube, unspecified ear
    - H69.81 - Other specified disorders of Eustachian tube, right ear
    - H69.82 - Other specified disorders of Eustachian tube, left ear
    - H69.83 - Other specified disorders of Eustachian tube, bilateral
    - H69.9 - Unspecified Eustachian tube disorder
    - H69.90 - Unspecified Eustachian tube disorder, unspecified ear
    - H69.91 - Unspecified Eustachian tube disorder, right ear
    - H69.92 - Unspecified Eustachian tube disorder, left ear
    - H69.93 - Unspecified Eustachian tube disorder, bilateral
  - - H70 - Mastoiditis and related conditions
    - H70.0 - Acute mastoiditis
    - H70.00 - Acute mastoiditis without complications
    - H70.001 - Acute mastoiditis without complications, right ear
    - H70.002 - Acute mastoiditis without complications, left ear
    - H70.003 - Acute mastoiditis without complications, bilateral
    - H70.009 - Acute mastoiditis without complications, unspecified ear
    - H70.01 - Subperiosteal abscess of mastoid
    - H70.011 - Subperiosteal abscess of mastoid, right ear
    - H70.012 - Subperiosteal abscess of mastoid, left ear
    - H70.013 - Subperiosteal abscess of mastoid, bilateral
    - H70.019 - Subperiosteal abscess of mastoid, unspecified ear
    - H70.09 - Acute mastoiditis with other complications
    - H70.091 - Acute mastoiditis with other complications, right ear
    - H70.092 - Acute mastoiditis with other complications, left ear
    - H70.093 - Acute mastoiditis with other complications, bilateral
    - H70.099 - Acute mastoiditis with other complications, unspecified ear
    - H70.1 - Chronic mastoiditis
    - H70.10 - Chronic mastoiditis, unspecified ear
    - H70.11 - Chronic mastoiditis, right ear
    - H70.12 - Chronic mastoiditis, left ear
    - H70.13 - Chronic mastoiditis, bilateral
    - H70.2 - Petrositis
    - H70.20 - Unspecified petrositis
    - H70.201 - Unspecified petrositis, right ear
    - H70.202 - Unspecified petrositis, left ear
    - H70.203 - Unspecified petrositis, bilateral
    - H70.209 - Unspecified petrositis, unspecified ear
    - H70.21 - Acute petrositis
    - H70.211 - Acute petrositis, right ear
    - H70.212 - Acute petrositis, left ear
    - H70.213 - Acute petrositis, bilateral
    - H70.219 - Acute petrositis, unspecified ear
    - H70.22 - Chronic petrositis
    - H70.221 - Chronic petrositis, right ear
    - H70.222 - Chronic petrositis, left ear
    - H70.223 - Chronic petrositis, bilateral
    - H70.229 - Chronic petrositis, unspecified ear
    - H70.8 - Other mastoiditis and related conditions
    - H70.81 - Postauricular fistula
    - H70.811 - Postauricular fistula, right ear
    - H70.812 - Postauricular fistula, left ear
    - H70.813 - Postauricular fistula, bilateral
    - H70.819 - Postauricular fistula, unspecified ear
    - H70.89 - Other mastoiditis and related conditions
    - H70.891 - Other mastoiditis and related conditions, right ear
    - H70.892 - Other mastoiditis and related conditions, left ear
    - H70.893 - Other mastoiditis and related conditions, bilateral
    - H70.899 - Other mastoiditis and related conditions, unspecified ear
    - H70.9 - Unspecified mastoiditis
    - H70.90 - Unspecified mastoiditis, unspecified ear
    - H70.91 - Unspecified mastoiditis, right ear
    - H70.92 - Unspecified mastoiditis, left ear
    - H70.93 - Unspecified mastoiditis, bilateral
  - - H71 - Cholesteatoma of middle ear
    - H71.0 - Cholesteatoma of attic
    - H71.00 - Cholesteatoma of attic, unspecified ear
    - H71.01 - Cholesteatoma of attic, right ear
    - H71.02 - Cholesteatoma of attic, left ear
    - H71.03 - Cholesteatoma of attic, bilateral
    - H71.1 - Cholesteatoma of tympanum
    - H71.10 - Cholesteatoma of tympanum, unspecified ear
    - H71.11 - Cholesteatoma of tympanum, right ear
    - H71.12 - Cholesteatoma of tympanum, left ear
    - H71.13 - Cholesteatoma of tympanum, bilateral
    - H71.2 - Cholesteatoma of mastoid
    - H71.20 - Cholesteatoma of mastoid, unspecified ear
    - H71.21 - Cholesteatoma of mastoid, right ear
    - H71.22 - Cholesteatoma of mastoid, left ear
    - H71.23 - Cholesteatoma of mastoid, bilateral
    - H71.3 - Diffuse cholesteatosis
    - H71.30 - Diffuse cholesteatosis, unspecified ear
    - H71.31 - Diffuse cholesteatosis, right ear
    - H71.32 - Diffuse cholesteatosis, left ear
    - H71.33 - Diffuse cholesteatosis, bilateral
    - H71.9 - Unspecified cholesteatoma
    - H71.90 - Unspecified cholesteatoma, unspecified ear
    - H71.91 - Unspecified cholesteatoma, right ear
    - H71.92 - Unspecified cholesteatoma, left ear
    - H71.93 - Unspecified cholesteatoma, bilateral
  - - H72 - Perforation of tympanic membrane
    - H72.0 - Central perforation of tympanic membrane
    - H72.00 - Central perforation of tympanic membrane, unspecified ear
    - H72.01 - Central perforation of tympanic membrane, right ear
    - H72.02 - Central perforation of tympanic membrane, left ear
    - H72.03 - Central perforation of tympanic membrane, bilateral
    - H72.1 - Attic perforation of tympanic membrane
    - H72.10 - Attic perforation of tympanic membrane, unspecified ear
    - H72.11 - Attic perforation of tympanic membrane, right ear
    - H72.12 - Attic perforation of tympanic membrane, left ear
    - H72.13 - Attic perforation of tympanic membrane, bilateral
    - H72.2 - Other marginal perforations of tympanic membrane
    - H72.2X - Other marginal perforations of tympanic membrane
    - H72.2X1 - Other marginal perforations of tympanic membrane, right ear
    - H72.2X2 - Other marginal perforations of tympanic membrane, left ear
    - H72.2X3 - Other marginal perforations of tympanic membrane, bilateral
    - H72.2X9 - Other marginal perforations of tympanic membrane, unsp ear
    - H72.8 - Other perforations of tympanic membrane
    - H72.81 - Multiple perforations of tympanic membrane
    - H72.811 - Multiple perforations of tympanic membrane, right ear
    - H72.812 - Multiple perforations of tympanic membrane, left ear
    - H72.813 - Multiple perforations of tympanic membrane, bilateral
    - H72.819 - Multiple perforations of tympanic membrane, unspecified ear
    - H72.82 - Total perforations of tympanic membrane
    - H72.821 - Total perforations of tympanic membrane, right ear
    - H72.822 - Total perforations of tympanic membrane, left ear
    - H72.823 - Total perforations of tympanic membrane, bilateral
    - H72.829 - Total perforations of tympanic membrane, unspecified ear
    - H72.9 - Unspecified perforation of tympanic membrane
    - H72.90 - Unsp perforation of tympanic membrane, unspecified ear
    - H72.91 - Unspecified perforation of tympanic membrane, right ear
    - H72.92 - Unspecified perforation of tympanic membrane, left ear
    - H72.93 - Unspecified perforation of tympanic membrane, bilateral
  - - H73 - Other disorders of tympanic membrane
    - H73.0 - Acute myringitis
    - H73.00 - Unspecified acute myringitis
    - H73.001 - Acute myringitis, right ear
    - H73.002 - Acute myringitis, left ear
    - H73.003 - Acute myringitis, bilateral
    - H73.009 - Acute myringitis, unspecified ear
    - H73.01 - Bullous myringitis
    - H73.011 - Bullous myringitis, right ear
    - H73.012 - Bullous myringitis, left ear
    - H73.013 - Bullous myringitis, bilateral
    - H73.019 - Bullous myringitis, unspecified ear
    - H73.09 - Other acute myringitis
    - H73.091 - Other acute myringitis, right ear
    - H73.092 - Other acute myringitis, left ear
    - H73.093 - Other acute myringitis, bilateral
    - H73.099 - Other acute myringitis, unspecified ear
    - H73.1 - Chronic myringitis
    - H73.10 - Chronic myringitis, unspecified ear
    - H73.11 - Chronic myringitis, right ear
    - H73.12 - Chronic myringitis, left ear
    - H73.13 - Chronic myringitis, bilateral
    - H73.2 - Unspecified myringitis
    - H73.20 - Unspecified myringitis, unspecified ear
    - H73.21 - Unspecified myringitis, right ear
    - H73.22 - Unspecified myringitis, left ear
    - H73.23 - Unspecified myringitis, bilateral
    - H73.8 - Other specified disorders of tympanic membrane
    - H73.81 - Atrophic flaccid tympanic membrane
    - H73.811 - Atrophic flaccid tympanic membrane, right ear
    - H73.812 - Atrophic flaccid tympanic membrane, left ear
    - H73.813 - Atrophic flaccid tympanic membrane, bilateral
    - H73.819 - Atrophic flaccid tympanic membrane, unspecified ear
    - H73.82 - Atrophic nonflaccid tympanic membrane
    - H73.821 - Atrophic nonflaccid tympanic membrane, right ear
    - H73.822 - Atrophic nonflaccid tympanic membrane, left ear
    - H73.823 - Atrophic nonflaccid tympanic membrane, bilateral
    - H73.829 - Atrophic nonflaccid tympanic membrane, unspecified ear
    - H73.89 - Other specified disorders of tympanic membrane
    - H73.891 - Other specified disorders of tympanic membrane, right ear
    - H73.892 - Other specified disorders of tympanic membrane, left ear
    - H73.893 - Other specified disorders of tympanic membrane, bilateral
    - H73.899 - Oth disrd of tympanic membrane, unspecified ear
    - H73.9 - Unspecified disorder of tympanic membrane
    - H73.90 - Unspecified disorder of tympanic membrane, unspecified ear
    - H73.91 - Unspecified disorder of tympanic membrane, right ear
    - H73.92 - Unspecified disorder of tympanic membrane, left ear
    - H73.93 - Unspecified disorder of tympanic membrane, bilateral
  - - H74 - Other disorders of middle ear mastoid
    - H74.0 - Tympanosclerosis
    - H74.01 - Tympanosclerosis, right ear
    - H74.02 - Tympanosclerosis, left ear
    - H74.03 - Tympanosclerosis, bilateral
    - H74.09 - Tympanosclerosis, unspecified ear
    - H74.1 - Adhesive middle ear disease
    - H74.11 - Adhesive right middle ear disease
    - H74.12 - Adhesive left middle ear disease
    - H74.13 - Adhesive middle ear disease, bilateral
    - H74.19 - Adhesive middle ear disease, unspecified ear
    - H74.2 - Discontinuity and dislocation of ear ossicles
    - H74.20 - Discontinuity and dislocation of ear ossicles, unsp ear
    - H74.21 - Discontinuity and dislocation of right ear ossicles
    - H74.22 - Discontinuity and dislocation of left ear ossicles
    - H74.23 - Discontinuity and dislocation of ear ossicles, bilateral
    - H74.3 - Other acquired abnormalities of ear ossicles
    - H74.31 - Ankylosis of ear ossicles
    - H74.311 - Ankylosis of ear ossicles, right ear
    - H74.312 - Ankylosis of ear ossicles, left ear
    - H74.313 - Ankylosis of ear ossicles, bilateral
    - H74.319 - Ankylosis of ear ossicles, unspecified ear
    - H74.32 - Partial loss of ear ossicles
    - H74.321 - Partial loss of ear ossicles, right ear
    - H74.322 - Partial loss of ear ossicles, left ear
    - H74.323 - Partial loss of ear ossicles, bilateral
    - H74.329 - Partial loss of ear ossicles, unspecified ear
    - H74.39 - Other acquired abnormalities of ear ossicles
    - H74.391 - Other acquired abnormalities of right ear ossicles
    - H74.392 - Other acquired abnormalities of left ear ossicles
    - H74.393 - Other acquired abnormalities of ear ossicles, bilateral
    - H74.399 - Other acquired abnormalities of ear ossicles, unsp ear
    - H74.4 - Polyp of middle ear
    - H74.40 - Polyp of middle ear, unspecified ear
    - H74.41 - Polyp of right middle ear
    - H74.42 - Polyp of left middle ear
    - H74.43 - Polyp of middle ear, bilateral
    - H74.8 - Other specified disorders of middle ear and mastoid
    - H74.8X - Other specified disorders of middle ear and mastoid
    - H74.8X1 - Other specified disorders of right middle ear and mastoid
    - H74.8X2 - Other specified disorders of left middle ear and mastoid
    - H74.8X3 - Oth disrd of middle ear and mastoid, bilateral
    - H74.8X9 - Oth disrd of middle ear and mastoid, unspecified ear
    - H74.9 - Unspecified disorder of middle ear and mastoid
    - H74.90 - Unsp disorder of middle ear and mastoid, unspecified ear
    - H74.91 - Unspecified disorder of right middle ear and mastoid
    - H74.92 - Unspecified disorder of left middle ear and mastoid
    - H74.93 - Unspecified disorder of middle ear and mastoid, bilateral
  - - H75 - Oth disord of mid ear and mastoid in diseases classd elswhr
    - H75.0 - Mastoiditis in infec/parastc diseases classified elsewhere
    - H75.00 - Mastoiditis in infec/parastc dis classd elswhr, unsp ear
    - H75.01 - Mastoiditis in infec/parastc diseases classd elswhr, r ear
    - H75.02 - Mastoiditis in infec/parastc dis classd elswhr, left ear
    - H75.03 - Mastoiditis in infec/parastc diseases classd elswhr, bi
    - H75.8 - Oth disrd of mid ear and mastoid in diseases classd elswhr
    - H75.80 - Oth disrd of mid ear and mast in dis classd elswhr, unsp ear
    - H75.81 - Oth disrd of r mid ear and mastoid in diseases classd elswhr
    - H75.82 - Oth disrd of l mid ear and mastoid in diseases classd elswhr
    - H75.83 - Oth disrd of mid ear and mastoid in dis classd elswhr, bi

Diseases of the ear and mastoid process