Skin and subcutaneous (L00-L99).
- Bullous dermatoses – blistering skin diseases.
- Eczema
- Furuncle – purulent inflammation of hair follicles or sebaceous glands.
- Herpes zoster oticus – shingles, which manifests itself in the ear canal.
- Keratosis obturans – abnormally scaling epithelium in the ear canal with cerumen (earwax).
- Psoriasis (psoriasis)
- Seborrheic dermatitis – skin inflammation associated with increased sebum production.
- Tuberculosis (consumption)
Infectious and parasitic diseases (A00-B99).
- Herpes zoster oticus – shingles manifesting in the ear canal.
Musculoskeletal system and connective tissue (M00-M99).
- Granulomatosis with polyangiitis (GPA), formerly Wegener’s granulomatosis – necrotizing (tissue dying) vasculitis (vascular inflammation) of the small to medium-sized vessels (small-vessel vasculitides), which is associated with granuloma formation (nodule formation) in the upper respiratory tract (nose, sinuses, middle ear, oropharynx) as well as the lower respiratory tract (lungs)
Neoplasms – tumor diseases (C00-D48).
- Basal cell carcinoma (BCC; basal cell carcinoma) of the external auditory canal.
- Carcinoma of the ear canal
- Middle ear carcinoma
- Squamous cell carcinoma of the external auditory canal – malignant tumor originating from the squamous epithelium.
Ears – mastoid process (H60-H95).
- Acute purulent otitis media (inflammation of the middle ear).
- Acute mastoiditis (mastoid process inflammation).
- Cerumen (earwax), liquefied.
- Cholesteatoma – ingrowth of multilayer keratinizing squamous epithelium in the middle ear with subsequent chronic purulent inflammation (“chronic bone suppuration”).
- Chronic otitis media (inflammation of the middle ear).
- Chronic mesotypmpanal otitis media (CMOM; chronic mucosal suppuration with central defect in the pars tensa of the tympanic membrane).
- Infectious otitis externa (inflammation of the external auditory canal; e.g., due tomycosis, bacteria (tuberculosis), viruses).
- Necrotizing osteitis (bone inflammation) of the tympanic ring.
- Otitis externa haemorrhagica (in viral infections, such as influenza).
- Reactive otitis externa (inflammation of the external auditory canal), eg:
- Eczema
- Psoriasis
- Seborrheic dermatitis
Symptoms and abnormal clinical and laboratory findings not elsewhere classified (R00-R99).
- Otoliquorrhea – CSF discharge (cerebrospinal fluid; neural fluid) from the ear or external auditory canal (meatus acusticus externus).
Injuries, poisoning, and other consequences of external causes (S00-T98).
- Infection due to foreign body, unspecified
- Ear cleaning, unspecified
- Injuries to the ear, unspecified (e.g., perforation of the eardrum: injury caused by foreign bodies, in about two-thirds of cases by cotton swabs (Q-tips); in adolescents between 13 and 18 years of age, in about one-third of cases, trauma during water sports (diving or water skiing))
Operations
- Paracentesis (stab incision/(making an incision with a scalpel of the tympanic membrane and /or insertion of tympanic drainage/tympanic tubes); possible complication: chronic persistent otorrhea (synonyms: ear discharge, ear discharge).
