In recent years chemo- and biotherapy has made such rapid strides that it has more or less eliminated operative treatment of acute mastoiditis and acute petrositis. Medical treatment thus has replaced the operative procedure in the inflammatory and especially suppurative stage, for which formerly surgery was resorted to in order to prevent meningeal involvement.
Today, only those cases which become chronic after medical treatment and which do not respond to this form of treatment are considered for surgery.
There is no difference, anatomically, embryologically, or histologically, between the mastoid cells and the petrous cells, and between the bone tissue of the mastoid portion and that of the petrous pyramid. Likewise, there is no difference between both tissues histopathologically in suppurative inflammation. There is no bacteriological or roentgenological difference between petrositis and mastoiditis. The petrous pyramid, the mastoid portion, and the tympanic cavity, namely, the deep parts and the superficial parts
NIHO S, NIHO M, FURUYA M, YASUDA K, KUDO H. Radical Surgery on the Temporal Bone and Labyrinth Operation for Hearing Improvement. AMA Arch Otolaryngol. 1958;67(2):156–166. doi:https://doi.org/10.1001/archotol.1958.00730010162005
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