An unusual, thick, horizontal, bony septum of the mastoid excluded a large cholesteatoma from the middle ear and antrum. As a result of this exclusion, the cholesteatoma eroded through the tip of the mastoid caused a persistent, draining, fistulous tract of the neck.
Cheng L, Chasin WD. Unusual Cause of Cervical Fistula. Arch Otolaryngol. 1970;92(4):399–401. doi:10.1001/archotol.1970.04310040087018
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