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Ⅰ.はじめに
グロームス腫瘍は1945年にRosenwasser1)が初めて報告した。わが国では比較的稀な疾患である。本腫瘍は血流に富み,組織学的には良性腫瘍であるが,周囲の骨破壊や再発をきたすこともあると報告されている2)。臨床的には腫瘍の発生部位によって鼓室型と頸静脈型のグロームス腫瘍に分類され,カテコラミンを産生する機能性腫瘍が1~3%にみられると報告されている3)。今回われわれは鼓室内に限局し,カテコラミン産生が疑われた鼓室型グロームス腫瘍症例を経験したので報告する。
□Abstract
A 64-year-old woman presented with a 4-year history of left-sided hearing loss and pulsatile tinnitus. On otolaryngological examinations, a reddish pulsating mass was seen through her left tympanic membrane. Computed tomography and magnetic resonance imaging revealed a well-enhanced soft tissue dentisity filling the mesotympanum. Bone destruction was not recognizable. The serum noradrenaline was elevated(584pg/ml)while adrenaline and dopamine were within normal limits. Under a preoperative diagnosis of glomus tympanicum tumor, she underwent selective embolization of the feeding arteries followed by transmastoid resection of the tumor, which was histopathologically diagnosed as paraganglioma. Her postoperative clinical course was uneventful, and the level of noradrenaline returned to normal. The patient is currently free from disease 17 months after surgery. Clinical and endocrinological characteristics of glomus tumors are bibliographically reviewed.
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