Rhinitis caseosa is a rare type of unilateral nasal disease characterized by the accumulation in the nose and sinuses of an extremely offensive, cheeselike mass, by the presence of a seropurulent discharge and other manifestations of chronic suppurative sinusitis and last by intranasal and frequently by extranasal deformity. The term rhinitis caseosa was conceived by Duplay in 1874. It was his opinion, based on experience with two cases and on a paper by Maisonneuve in 1855, that facial erysipelas precedes the development of rhinitis caseosa. The erysipelas involves the nasal mucosa by extension, whence epithelial exfoliations and the retention of the exfoliated débris result in the formation of the characteristic foul, cheeselike mass, which Duplay considered to be "analogous to the contents of certain sebaceous cysts."
Subsequent authors found no quarrel with Duplay's classic description of the endonasal picture and postoperative course of this disease,
MEYERSBURG H, BERNSTIEN P, MEZZ D. RHINITIS CASEOSA: ANALYSIS OF THE LITERATURE AND REPORT OF A CASE. Arch Otolaryngol. 1936;23(4):449–457. doi:10.1001/archotol.1936.00640040458006
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