Differential Diagnosis for Otoscope with Whitish Discharge and Inflamed External Auditory Canal (EAC)
- The following differential diagnosis is based on the presentation of whitish discharge and inflammation of the EAC as observed through an otoscope.
Single Most Likely Diagnosis
- Otitis Externa (Swimmer's Ear): This condition is characterized by inflammation of the EAC, often caused by bacterial or fungal infections. The whitish discharge and inflamed EAC are consistent with otitis externa, making it the most likely diagnosis.
Other Likely Diagnoses
- Eczcerma or Dermatitis of the EAC: Conditions like eczema or dermatitis can cause inflammation and discharge in the EAC, presenting similarly to otitis externa.
- Fungal Infection of the EAC: Fungal infections, such as those caused by Aspergillus or Candida, can also lead to whitish discharge and inflammation of the EAC.
- Allergic Reaction: An allergic reaction to ear drops, jewelry, or other substances can cause inflammation and discharge in the EAC.
Do Not Miss Diagnoses
- Malignant Otitoming Otitra (Necrotizing Otitra): Although rare, this condition is a severe infection that can spread to the skull base and is life-threatening if not promptly treated. It typically presents with severe pain and discharge.
- Relapsing Polychondritis: This autoimmune condition can cause inflammation of the cartilaginous structures, including the EAC, and can lead to significant complications if not recognized and treated.
Rare Diagnoses
- Keratosis Obturans: A condition characterized by the accumulation of desquamated skin in the EAC, which can cause a whitish appearance and potentially lead to secondary infections.
- Cholesteatoma: An abnormal skin growth in the middle ear behind the eardrum, which can cause discharge and may be visible as a whitish mass in the EAC, although it's more commonly associated with the middle ear.