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glomangiopericytomaは鼻腔・副鼻腔に発生するまれな間葉系境界悪性腫瘍である。従来,孤立性線維性腫瘍/血管周皮腫の一亜型とされてきたが,生物学的特性や組織学的特徴から区別され,2005年のWHO分類に新しい組織型として記載された1)。一般に境界明瞭で分葉状であり,また豊富な血流を有する易出血性の粘膜下腫瘤として認められる2)3)。今回,典型的な鼻腔原発のglomangiopericytomaの1例を経験したので,若干の文献的考察を加えて報告する。
We report a case of Glomangiopericytoma in a 40-year-old woman with the chief complaint of nasal obstruction and epistaxis. CT and MRI examinations demonstrated a well-defined round contoured soft-tissue masses that obstructed mainly the right nasal cavity. The mass show heterogeneous high signal intensity on T2WI and demonstrated high mean ADC values. On contrast-enhanced MR imaging, it revealed avid and heterogeneous enhancement. Biopsy revealed glomangiopericytoma. The tumor was treated with complete endoscopic resection. Glomangiopericytoma is a rare sinonasal mesenchymal tumor of borderline or low malignant potential. Although it is a rare disease, it should be included in the differential diagnosis of hypervascular tumors in the nasal and sinonasal cavity.
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