電撃型中耳炎に於ける乳樣突起部及び錐體組織像に就て

　緒言

　所謂電撃性中耳炎の側頭骨に於ける組織學的所見は興味の的であつたが，最近私は病後30時間の乳樣突起を手術し，又其の後錐體手術の止むなきに到り其の組織學的檢索を行う事が出來たので茲に報告し諸先生方の御批判を仰ぐ次第である．

YOSHIO reports a case of otitis media which began with a stormy onset. A child 8 years old complaining of a severe earache was treated with paracentesis of tympaniC membrane 1 hour after the onset of symptoms but failed to allay that of vomit-ing and dizzinass. The ear discharge was copious. Twenty four hours 'later the spinal fluid pressure was increased to 220 mm of mercury. For which and other reasons simple mastoidectomy was preformed on the patient exactly 30 hours following the onset of the affliction. Post-operatively, penicillin inject-ions and sulfadiazine were administered. The patient continued to complain of nausea and vertigo in spite of the fact that fever had subsided.. Radiographic examination showed bony destruction in the petrous was performed by the combined methods of Yamashita, Force and Strite. The patient, thereafter, became asymptomatic and was completely cured in 40 days.

Micrescopic examination of the bony and granulation tissues removed from the mastoid process showed hemorrhagic inflammation in the canaliculae of the former and round cell infiltration of the latter. By the 16 day when petrostomy was performed the infla-mma tory process in this structure was shown to have taken a change to a chronic type in which hemorrhage was negligible and cell infiltration was markedly prominent. There were areas showing bony necrosis that were surrounded by granulation tissues and others in which a beginning absorption and new formation of bones could be discerned.