The existence of fungi in the external auditory canal has been known for many years but the nature of the condition is still obscure. It usually exists when the aural epidermis has been macerated or otherwise diseased. On examination there are seen scurfy, moist-looking, flat masses of a dirty white or brown color,on which there may be found slightly elevated, gray, green, yellow, brown or black spots. The surface may appear glazed, due to the amount of serous discharge, and deafness, tinnitus aurium, itching and a certain degree of eczematous inflammation are usually present. It would appear that the drum is primarily attacked and that the disease spreads from there along the canal. It is probably due to the aspergillus niger or the aspergillus glaucus.
Prognosis and Treatment – Good results may be expected from careful treatment, although there is no tendency to spontaneous evolution and if neglected, a certain degree of deafness will result. The case should then be referred to an aurist. The fungus and consequent accumulations may be removed by syringing with a weak alkaline solution; after which alcohol, full strength or diluted (Lowenberg), or a 1 per cent. solution of sodium hyposulphite (Burnett) may be applied.